Trial Outcomes & Findings for A Phase 2 Study of the Effects of Sapropterin Dihydrochloride on Symptomatic Peripheral Arterial Disease (NCT NCT00403494)

NCT ID: NCT00403494

Last Updated: 2021-01-07

Results Overview

This is to assess the effect of oral sapropterin dihydrochloride versus placebo on peak walking time (PWT) in subjects with intermittent claudication (IC) caused by peripheral arterial disease (PAD).

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

190 participants

Primary outcome timeframe

Baseline and up to Week 24

Results posted on

2021-01-07

Participant Flow

This is a multicenter, multinational study. 31 principal investigators (PIs) enrolled subjects at 10 sites in Argentina sites and 21 sites in the United States (US). A total of 190 patients were recruited with 96 subjects randomized to Sapropterin dihydrichloride and 94 to Placebo. 65 subjects were in Argentina - (32 Sapropterin dihydrochloride, 33 Placebo), and 125 subjects in the US - (64 Sapropterin dihydrochloride, 61 Placebo)

Participant milestones

Participant milestones
Measure
Sapropterin Dihydrochloride
Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks.
Placebo
Subjects receive matching oral Placebo twice daily for 24 week.
Overall Study
STARTED
96
94
Overall Study
Intent to Treat
87
83
Overall Study
Per-protocol
69
69
Overall Study
Safety Population
97
91
Overall Study
COMPLETED
81
80
Overall Study
NOT COMPLETED
15
14

Reasons for withdrawal

Reasons for withdrawal
Measure
Sapropterin Dihydrochloride
Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks.
Placebo
Subjects receive matching oral Placebo twice daily for 24 week.
Overall Study
Adverse Event
10
8
Overall Study
Withdrew Consent
3
2
Overall Study
Inappropriately enrolled
0
1
Overall Study
Lost to Follow-up
0
2
Overall Study
Protocol noncompliance
0
1
Overall Study
Death
1
0
Overall Study
Sponsor Request
1
0

Baseline Characteristics

A Phase 2 Study of the Effects of Sapropterin Dihydrochloride on Symptomatic Peripheral Arterial Disease

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Sapropterin Dihydrochloride
n=87 Participants
Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks.
Placebo
n=83 Participants
Subjects receive matching oral Placebo twice daily for 24 weeks.
Total
n=170 Participants
Total of all reporting groups
Age, Continuous
68.0 years
STANDARD_DEVIATION 8.9 • n=5 Participants
66.6 years
STANDARD_DEVIATION 7.0 • n=7 Participants
67.3 years
STANDARD_DEVIATION 8.1 • n=5 Participants
Sex: Female, Male
Female
22 Participants
n=5 Participants
23 Participants
n=7 Participants
45 Participants
n=5 Participants
Sex: Female, Male
Male
65 Participants
n=5 Participants
60 Participants
n=7 Participants
125 Participants
n=5 Participants
Age
< 65 years
28 Participants
n=5 Participants
35 Participants
n=7 Participants
63 Participants
n=5 Participants
Age
>= 65 years
59 Participants
n=5 Participants
48 Participants
n=7 Participants
107 Participants
n=5 Participants
Age
>= 75 years
25 Participants
n=5 Participants
10 Participants
n=7 Participants
35 Participants
n=5 Participants
Race
White
80 Participants
n=5 Participants
75 Participants
n=7 Participants
155 Participants
n=5 Participants
Race
Black/African American
5 Participants
n=5 Participants
7 Participants
n=7 Participants
12 Participants
n=5 Participants
Race
Other
2 Participants
n=5 Participants
0 Participants
n=7 Participants
2 Participants
n=5 Participants
Race
Asian
0 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
Ethnicity
Not Hispanic or Latino
58 Participants
n=5 Participants
52 Participants
n=7 Participants
110 Participants
n=5 Participants
Ethnicity
Hispanic or Latino
29 Participants
n=5 Participants
31 Participants
n=7 Participants
60 Participants
n=5 Participants
Country of Study Site
United States
60 Participants
n=5 Participants
53 Participants
n=7 Participants
113 Participants
n=5 Participants
Country of Study Site
Argentina
27 Participants
n=5 Participants
30 Participants
n=7 Participants
57 Participants
n=5 Participants
With/Without Vitamin C
Without Vitamin C
41 Participants
n=5 Participants
39 Participants
n=7 Participants
80 Participants
n=5 Participants
With/Without Vitamin C
With Vitamin C
46 Participants
n=5 Participants
44 Participants
n=7 Participants
90 Participants
n=5 Participants

PRIMARY outcome

Timeframe: Baseline and up to Week 24

Population: Intent-To-Treat Population consisting of all subjects who were randomized, received 1 dose of study drug and had at least 1 post-baselline treadmill test.

This is to assess the effect of oral sapropterin dihydrochloride versus placebo on peak walking time (PWT) in subjects with intermittent claudication (IC) caused by peripheral arterial disease (PAD).

Outcome measures

Outcome measures
Measure
Sapropterin Dihydrochloride
n=87 Participants
Intent to Treat Population. Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks
Placebo
n=83 Participants
Intent to Treat Population. Subjects receive matching oral Placebo twice daily for 24 weeks.
Change in Peak Walking Time (PWT) From Baseline
Baseline
5.394 minutes
Standard Deviation 2.803
5.712 minutes
Standard Deviation 2.876
Change in Peak Walking Time (PWT) From Baseline
Change from Baseline to Week 24
1.121 minutes
Standard Deviation 2.775
1.493 minutes
Standard Deviation 2.597

PRIMARY outcome

Timeframe: Up to 24-weeks

Population: Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.

Adverse events were described and summarized with focus on treatment- emergent events (TEAEs). A TEAE was defined as any AE that presented , increased in frequency or worsened in severity following initiation of study drug administration. If the onset of an AE was missing then the AE was considered treatment emergent. Drug-related AEs are AEs classified by the investigator as possibly or probably related to study drug.

Outcome measures

Outcome measures
Measure
Sapropterin Dihydrochloride
n=97 Participants
Intent to Treat Population. Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks
Placebo
n=91 Participants
Intent to Treat Population. Subjects receive matching oral Placebo twice daily for 24 weeks.
Number of Subjects With Adverse Events (AEs)
Any AEs
84 Participants
66 Participants
Number of Subjects With Adverse Events (AEs)
Study Drug-related AEs
29 Participants
30 Participants
Number of Subjects With Adverse Events (AEs)
Study-Drug-related SAEs
0 Participants
1 Participants
Number of Subjects With Adverse Events (AEs)
Any AEs leading to Study Withdrawal
11 Participants
7 Participants
Number of Subjects With Adverse Events (AEs)
Study Drug-related AEs leading to Study WIthdrawal
4 Participants
5 Participants
Number of Subjects With Adverse Events (AEs)
Any SAEs Leading to Study Withdrawal
4 Participants
1 Participants
Number of Subjects With Adverse Events (AEs)
Study Drug-related SAEs Leading to Study Withdrawal
0 Participants
1 Participants
Number of Subjects With Adverse Events (AEs)
Deaths
1 Participants
0 Participants
Number of Subjects With Adverse Events (AEs)
Any SAEs
14 Participants
11 Participants

SECONDARY outcome

Timeframe: Baseline and up to Week 24

Population: Intent-To-Treat Population

Time, in minutes, when the subject first begins to experience claudication symptoms, regardless of whether this is manifested as muscle pain, ache, cramp, numbness or fatigue.

Outcome measures

Outcome measures
Measure
Sapropterin Dihydrochloride
n=87 Participants
Intent to Treat Population. Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks
Placebo
n=83 Participants
Intent to Treat Population. Subjects receive matching oral Placebo twice daily for 24 weeks.
Change in Claudication Onset Time (COT) From Baseline
Baseline
2.159 minutes
Standard Deviation 1.611
2.313 minutes
Standard Deviation 1.689
Change in Claudication Onset Time (COT) From Baseline
Change from Baseline to Week 24
0.903 minutes
Standard Deviation 1.900
1.015 minutes
Standard Deviation 1.902

OTHER_PRE_SPECIFIED outcome

Timeframe: Baseline up to 24 weeks

Population: Intent-to-Treat Population

The first 50% of subjects enrolled in the study were randomized to receive sapropterin dihydrochloride at 400 mg BID or oral placebo BID alone (without vitamin C). When approximately 50% enrollment was met, 1000 mg/day vitamin C was added to the dose regimen of newly enrolled subjects in both sapropterin dihydrochloride and placebo treatment groups given orally in two divided doses of 500 mg with study drug.

Outcome measures

Outcome measures
Measure
Sapropterin Dihydrochloride
n=87 Participants
Intent to Treat Population. Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks
Placebo
n=83 Participants
Intent to Treat Population. Subjects receive matching oral Placebo twice daily for 24 weeks.
Change in Peak Walking Time From Baseline With and Without Vitamin C
Baseline without vitamin C
4.776 minutes
Standard Deviation 2.650
5.201 minutes
Standard Deviation 2.781
Change in Peak Walking Time From Baseline With and Without Vitamin C
Change from Baseline week 24; without vitamin C
0.264 minutes
Standard Deviation 2.064
0.607 minutes
Standard Deviation 2.166
Change in Peak Walking Time From Baseline With and Without Vitamin C
Baseline with vitamin C
5.944 minutes
Standard Deviation 2.849
6.164 minutes
Standard Deviation 2.914
Change in Peak Walking Time From Baseline With and Without Vitamin C
Change from Baseline week 24; with vitamin C
1.826 minutes
Standard Deviation 3.093
2.255 minutes
Standard Deviation 2.716

Adverse Events

Sapropterin Dihydrochloride

Serious events: 14 serious events
Other events: 84 other events
Deaths: 1 deaths

Placebo

Serious events: 11 serious events
Other events: 66 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Sapropterin Dihydrochloride
n=97 participants at risk
Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks.
Placebo
n=91 participants at risk
Subjects receive matching oral Placebo twice daily for 24 weeks.
Cardiac disorders
Atrial flutter
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Angina pectoris
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Acute coronary syndrome
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Angina unstable
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Arterial occlusive disease
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Cerebrovascular accident
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Coronary artery disease
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Gastric haemorrhage
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Ischaemic limb pain
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Peripheral vascular disorder
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Renal artery stenosis
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Myocardial infarction
2.1%
2/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Cardiac failure
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Cardiac failure congestive
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Myocardial ischaemia
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Cardiac disorders
Tachyarrhythmia
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Pneumonia
2.1%
2/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Urinary tract infection
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Abdominal pain
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Retroperitoneal neoplasm
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Investigations
Electrocardiogram abnormal
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Investigations
Prostate examination abnormal
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Respiratory, thoracic and mediastinal disorders
Chronic obstructive pulmonary disease
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Respiratory, thoracic and mediastinal disorders
Pneumonia
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
General disorders
Death
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Nervous system disorders
Transient ischaemic attack
1.0%
1/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Psychiatric disorders
Alcoholism
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Skin and subcutaneous tissue disorders
Cellulitis
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.

Other adverse events

Other adverse events
Measure
Sapropterin Dihydrochloride
n=97 participants at risk
Subjects receive 400 mg oral sapropterin dihydrochloride twice daily for 24 weeks.
Placebo
n=91 participants at risk
Subjects receive matching oral Placebo twice daily for 24 weeks.
Gastrointestinal disorders
Diarrhoea
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
7.7%
7/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Nausea
5.2%
5/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
4.4%
4/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
General disorders
Pharmaceutical product complaint
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
7.7%
7/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Back pain
9.3%
9/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
4.4%
4/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Pain in extremity
5.2%
5/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
6.6%
6/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Arthralgia
6.2%
6/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Nasopharyngitis
6.2%
6/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Nervous system disorders
Headache
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
5.5%
5/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Hypotension
8.2%
8/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Intermittent claudication
6.2%
6/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Abdominal pain
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Abdominal Pain Upper
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
General disorders
Fatigue
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
4.4%
4/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Vascular disorders
Hypertension
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
4.4%
4/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
General disorders
Oedema peripheral
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
4.4%
4/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Upper respiratory tract infection
4.1%
4/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Bronchitis
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Gastrooesophageal reflux disease
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Nervous system disorders
Insomnia
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Muscle spasms
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Musculoskeletal discomfort
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Musculoskeletal and connective tissue disorders
Musculoskeletal pain
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
0.00%
0/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Infections and infestations
Urinary tract infection
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
3.3%
3/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Flatulence
2.1%
2/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
5.5%
5/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Gastrointestinal disorders
Dyspepsia
0.00%
0/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
5.5%
5/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
Respiratory, thoracic and mediastinal disorders
Pneumonia
3.1%
3/97 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.
1.1%
1/91 • Up to 25 Weeks
Of the 188 patients (96 randomized to study drug and 94 to placebo.) 2 subjects randomized to receive placebo, received at least 1 dose of study drug and were included in the study drug group. 1 participant from each group was excluded from the safety analysis because they did not have at least 1 post-Baseline safety assessment.

Additional Information

Joshua Lilienstein/Medical Director, Global Medical Affairs

BioMarin Pharmaceutical Inc.

Phone: 651.523.0310

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place

Restriction type: GT60