Trial Outcomes & Findings for A Study in Older Subjects to Evaluate the Safety and Ability of Andexanet Alfa to Reverse the Anticoagulation Effect of Apixaban (NCT NCT02207725)

NCT ID: NCT02207725

Last Updated: 2023-08-08

Results Overview

In Part I, the primary endpoint was percent change from baseline in anti-fXa activity at the nadir, when nadir was defined as the smaller value for anti-fXa activity at the +2 minutes or +5 minutes time point following the end of the bolus. In Part II, the primary endpoint was the percent change from baseline in anti-fXa activity from its baseline to nadir, when nadir was defined as the smaller value for anti-fXa activity between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion. The baseline for the primary endpoint in both parts was the anti-fXa activity just prior to administration of andexanet, 3 hours following the Day 4 dose of apixaban. Anti-fXa activity was measured by a modified chromogenic assay.

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

68 participants

Primary outcome timeframe

Baseline to +2 minutes or +5 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Results posted on

2023-08-08

Participant Flow

Subject recruitment occurred at investigative site in the US between March 2014 through December 2014

Apixaban was administered orally at 5 mg twice daily for 3.5 days to steady-state and then administered andexanet as a bolus (400 mg; Part I) or as a bolus followed by an infusion (400 mg bolus followed by 4 mg/min infusion for 120 minutes, 880 mg total dose; Part II). Bolus was started 3 hours after the last apixaban dose.

Participant milestones

Participant milestones
Measure
Placebo (Part I)
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Overall Study
STARTED
9
25
9
25
Overall Study
COMPLETED
9
24
8
24
Overall Study
NOT COMPLETED
0
1
1
1

Reasons for withdrawal

Reasons for withdrawal
Measure
Placebo (Part I)
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Overall Study
Did Not Receive Treatment
0
1
1
1

Baseline Characteristics

A Study in Older Subjects to Evaluate the Safety and Ability of Andexanet Alfa to Reverse the Anticoagulation Effect of Apixaban

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Total
n=65 Participants
Total of all reporting groups
Age, Continuous
59.0 years
STANDARD_DEVIATION 3.54 • n=5 Participants
61.0 years
STANDARD_DEVIATION 6.37 • n=7 Participants
59.5 years
STANDARD_DEVIATION 6.91 • n=5 Participants
59.4 years
STANDARD_DEVIATION 7.83 • n=4 Participants
59.9 years
STANDARD_DEVIATION 6.64 • n=21 Participants
Sex: Female, Male
Female
3 Participants
n=5 Participants
11 Participants
n=7 Participants
3 Participants
n=5 Participants
7 Participants
n=4 Participants
24 Participants
n=21 Participants
Sex: Female, Male
Male
6 Participants
n=5 Participants
13 Participants
n=7 Participants
5 Participants
n=5 Participants
17 Participants
n=4 Participants
41 Participants
n=21 Participants

PRIMARY outcome

Timeframe: Baseline to +2 minutes or +5 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Population: Modified Intent-to-Treat Population included all subjects receiving andexanet/placebo with anti-fXa activity baseline value at ≥1 timepoints: 2 or 5 minute after the end of the bolus (Part I; N = 33); 110 minute during continuous infusion, 2 minute before or 5 minute after the end of continuous infusion (Part II; N = 31).

In Part I, the primary endpoint was percent change from baseline in anti-fXa activity at the nadir, when nadir was defined as the smaller value for anti-fXa activity at the +2 minutes or +5 minutes time point following the end of the bolus. In Part II, the primary endpoint was the percent change from baseline in anti-fXa activity from its baseline to nadir, when nadir was defined as the smaller value for anti-fXa activity between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion. The baseline for the primary endpoint in both parts was the anti-fXa activity just prior to administration of andexanet, 3 hours following the Day 4 dose of apixaban. Anti-fXa activity was measured by a modified chromogenic assay.

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy: Percent Change From Baseline in Anti-fXa Activity at the Nadir (Parts I and II)
-20.71 Percent change in anti-fXa activity
Standard Deviation 8.559
-93.86 Percent change in anti-fXa activity
Standard Deviation 1.650
-32.70 Percent change in anti-fXa activity
Standard Deviation 5.578
-92.34 Percent change in anti-fXa activity
Standard Deviation 2.809

SECONDARY outcome

Timeframe: Baseline to +2 minutes or +5 minutes following the end of andexanet/placebo bolus (Part II)

Population: mITT; 33 and 31 subjects who received andexanet or placebo were included in the PD analysis in Part I and II, respectively.

The percent change from baseline in anti-fXa activity at the nadir, following the bolus, when nadir was defined as the smaller value for anti-fXa activity at the +2 minute or +5 minute time point after the completion of the andexanet bolus (Part II). Baseline was the last assessment obtained prior to the first dose of andexanet or placebo

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=8 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy: Percent Change From Baseline in Anti-fXa Activity at the Nadir (Part II)
-16.73 Percent change in anti-fXa activity
Standard Deviation 4.104
-93.49 Percent change in anti-fXa activity
Standard Deviation 1.525

SECONDARY outcome

Timeframe: Baseline to +2 minutes or +5 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Population: mITT; 33 and 31 subjects who received andexanet or placebo were included in the pharmacodynamics (PD) analysis in Part I and II, respectively.

Occurrence of ≥80% reduction in anti-fXa activity from its baseline to nadir, when nadir was defined as the smaller value for anti-fXa activity at the +2 minute or +5 minute time point after the completion of the andexanet bolus (Part I) or between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion (inclusive) \[Part II\]. Baseline was the last assessment obtained prior to the first dose of andexanet or placebo

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy: Number of Participants With ≥80% Reduction in the Anti-fXa Activity From Baseline to Nadir
0 Participants
24 Participants
0 Participants
23 Participants

SECONDARY outcome

Timeframe: Baseline to +2 minutes or +5 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Population: 54 subjects who received apixaban were included in the apixaban pharmacokinetics (PK) analysis

Change from baseline in free apixaban concentration (ng/mL) at the nadir, when nadir was defined as the smaller value for free apixaban at the +2 minute or +5 minute time point after the completion of the andexanet bolus (Part I) or between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion (inclusive) \[Part II\]. Free plasma concentrations of apixaban was determined using a validated method that involved analysis of citrated human plasma with high-throughput equilibrium dialysis followed by liquid chromatography mass spectrometry.

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy -Change From Baseline in Free Apixaban Concentration at the Nadir
-1.854 ng/mL
Standard Deviation 1.6152
-9.338 ng/mL
Standard Deviation 3.2043
-2.964 ng/mL
Standard Deviation 1.1567
-6.480 ng/mL
Standard Deviation 2.7814

SECONDARY outcome

Timeframe: Baseline to +2 minutes or +10 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Population: 33 and 31 subjects who received andexanet or placebo were included in the PD analysis in Part I and II, respectively; mITT population

Change in ETP from baseline to its peak, where peak was defined as the largest value for ETP between the +2 minute time point and the +10 minute time point after the end of the andexanet bolus (inclusive) {Part I\] or between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion (inclusive) \[Part II\]. Baseline was the last assessment obtained prior to the first dose of andexanet or placebo. ETP was measured using a tissue factor-initiated thrombin generation assay.

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy: Change in Thrombin Generation (ETP) From Baseline to Its Peak [Parts I and II]
88.182 nmol/min
Standard Deviation 125.7621
1323.180 nmol/min
Standard Deviation 335.4321
189.409 nmol/min
Standard Deviation 184.7842
1193.060 nmol/min
Standard Deviation 263.3471

SECONDARY outcome

Timeframe: Baseline to +2 minutes or +10 minutes following the end of andexanet/placebo bolus (Part I), or 10 minutes prior to end of andexanet/placebo continuous infusion or 5 minutes after the end of andexanet/placebo continuous infusion (Part II)

Population: 33 and 31 subjects who received andexanet or placebo were included in the PD analysis in Part I and II, respectively; mITT population

Number of participants with ETP above the lower limit of the normal range at its peak, between the +2 minute time point and the +10 minute time point after the end of the andexanet bolus (inclusive) \[Part I\] or between the 110-minute time point (10 minutes prior to the end of the continuous infusion) and the 5-minute time point after the end of the continuous infusion (inclusive) \[Part II\]. ETP was measured using a tissue factor-initiated thrombin generation assay

Outcome measures

Outcome measures
Measure
Placebo (Part I)
n=9 Participants
Placebo was administered intravenously (IV) as a bolus (Part I). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part I)
n=24 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute (Part 1). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Placebo (Part II)
n=8 Participants
Placebo was administered IV as a bolus followed by a continuous infusion for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban).
Andexanet (Part II)
n=23 Participants
Andexanet was administered IV as a bolus of 400 mg at a target rate of approximately 30 mg/minute, followed by a continuous infusion of 480 mg at 4 mg/minute for 120 minutes (Part II). The bolus was started 3 hours after the last apixaban dose (at the approximate steady-state Cmax for apixaban)
Efficacy: Number of Participants With Thrombin Generation (ETP) Above the Lower Limit of the Derived Normal Range at Its Peak (mITT Population)
1 Participants
24 Participants
2 Participants
23 Participants

Adverse Events

Placebo (Part I)

Serious events: 0 serious events
Other events: 3 other events
Deaths: 0 deaths

Andexanet (Part I)

Serious events: 0 serious events
Other events: 7 other events
Deaths: 0 deaths

Placebo (Part II)

Serious events: 0 serious events
Other events: 2 other events
Deaths: 0 deaths

Andexanet (Part II)

Serious events: 0 serious events
Other events: 9 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Placebo (Part I)
n=9 participants at risk
Vehicle Control
Andexanet (Part I)
n=24 participants at risk
400 mg bolus
Placebo (Part II)
n=8 participants at risk
Vehicle Control
Andexanet (Part II)
n=24 participants at risk
400 mg bolus + 480 mg infusion (4 mg/min)
Gastrointestinal disorders
Constipation
0.00%
0/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
8.3%
2/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
General disorders
Vessel Puncture Site Haemorrhage
11.1%
1/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
16.7%
4/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
General disorders
Vessel Puncture Site Pain
11.1%
1/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
8.3%
2/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
General disorders
Vessel Puncture Site Swelling
0.00%
0/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
8.3%
2/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
Injury, poisoning and procedural complications
Infusion Related Reaction
0.00%
0/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
12.5%
3/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
25.0%
2/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
16.7%
4/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
Musculoskeletal and connective tissue disorders
Arthralgia
0.00%
0/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
8.3%
2/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
Nervous system disorders
Headache
11.1%
1/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
12.5%
3/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
Skin and subcutaneous tissue disorders
Dermatitis Contact
11.1%
1/9 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
12.5%
3/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
12.5%
1/8 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)
0.00%
0/24 • ~8 to 12 weeks
The Safety Analysis Population consisted of all subjects randomized and treated with study drug (andexanet or placebo)

Additional Information

Head of Clinical Development

Portola Pharmaceuticals, Inc.

Phone: 650-246-7000

Results disclosure agreements

  • Principal investigator is a sponsor employee Conducted in healthy volunteers at Clinical Research Organization.
  • Publication restrictions are in place

Restriction type: OTHER