Trial Outcomes & Findings for Ability of Partial Inverse Agonist, Iomazenil, to Block Ethanol Effects in Humans (NCT NCT01590277)

NCT ID: NCT01590277

Last Updated: 2024-10-09

Results Overview

A 14-item scale with 7 items designated to assess stimulant effects associated with the ascending limb of ethanol intoxication and 7 items developed to measure sedative effects associated with the descending limb of ethanol intoxication. The BAES full scale would be 0 to 140. However, the scale itself is analyzed by breaking up the full 14 item scale into 2 parts - sedation and stimulation. Therefore, the total score for sedation ranges from 0 to 70, with higher scores indicating more sedation, and the total score for stimulation also ranges from 0 to 70, with higher scores indicating more stimulation. Timepoints: Administered 160 mins (M160) and 10 mins (M10) prior to the target ethanol/placebo dose being reached, when the target ethanol dose (BrAC of 0.1%)/placebo has been reached (0), and 15 (P15), 70 (P70), 90 (P90), and 150 (P150) minutes after the target ethanol/placebo dose has been reached.

Recruitment status

COMPLETED

Study phase

PHASE1

Target enrollment

33 participants

Primary outcome timeframe

Administered 160 mins and 10 mins prior to the target ethanol/placebo dose being reached, when the target ethanol dose (BrAC of 0.1%)/placebo has been reached, and 15, 70, 90, 150, and 240 minutes after the target ethanol/placebo dose has been reached.

Results posted on

2024-10-09

Participant Flow

33 participants initiated study procedures beyond screening. Of these 33 participants, 30 completed all four test days (thus receiving all four treatment conditions, one on each of the four test days), 2 participants withdrew from the study after 2 test days (receiving 2 out of the 4 treatment conditions), and 1 participant withdrew after 1 test day (receiving 1 out of the 4 treatment conditions..

Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil

Participant milestones

Participant milestones
Measure
All Study Participants
ARM 1: Active Ethanol and Active Iomazenil: Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. ARM 2: Active Ethanol and Placebo Iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes ARM 3: Placebo Ethanol and Active Iomazenil. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. Placebo: Control: no alcohol, administered for a total of 90 minutes. ARM 4: Placebo Ethanol and Placebo Iomazenil Placebo: Control: no alcohol, administered for a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Overall Study
STARTED
33
Overall Study
Active Ethanol and Placebo Iomazenil
31
Overall Study
Active Ethanol and Active Iomazenil
30
Overall Study
Placebo Ethanol and Active Iomazenil
32
Overall Study
Placebo Ethanol and Placebo Iomazenil
32
Overall Study
COMPLETED
26
Overall Study
NOT COMPLETED
7

Reasons for withdrawal

Reasons for withdrawal
Measure
All Study Participants
ARM 1: Active Ethanol and Active Iomazenil: Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. ARM 2: Active Ethanol and Placebo Iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes ARM 3: Placebo Ethanol and Active Iomazenil. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. Placebo: Control: no alcohol, administered for a total of 90 minutes. ARM 4: Placebo Ethanol and Placebo Iomazenil Placebo: Control: no alcohol, administered for a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Overall Study
Withdrawal by Subject
1

Baseline Characteristics

Ability of Partial Inverse Agonist, Iomazenil, to Block Ethanol Effects in Humans

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Enrolled Participants (N=33)
n=33 Participants
Baseline demographics for all participants that initiated study procedures beyond screening. Participants will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo on each of 4 separate test days. Potential Randomizations for each test day are: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil. A participant who completes all four test days will receive each of the potential randomizations throughout their study participation.
Age, Categorical
<=18 years
0 Participants
n=5 Participants
Age, Categorical
Between 18 and 65 years
33 Participants
n=5 Participants
Age, Categorical
>=65 years
0 Participants
n=5 Participants
Age, Continuous
25.76 years
STANDARD_DEVIATION 3.55 • n=5 Participants
Sex: Female, Male
Female
0 Participants
n=5 Participants
Sex: Female, Male
Male
33 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
5 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
28 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
6 Participants
n=5 Participants
Race (NIH/OMB)
White
26 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
1 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants

PRIMARY outcome

Timeframe: Administered 160 mins and 10 mins prior to the target ethanol/placebo dose being reached, when the target ethanol dose (BrAC of 0.1%)/placebo has been reached, and 15, 70, 90, 150, and 240 minutes after the target ethanol/placebo dose has been reached.

A 14-item scale with 7 items designated to assess stimulant effects associated with the ascending limb of ethanol intoxication and 7 items developed to measure sedative effects associated with the descending limb of ethanol intoxication. The BAES full scale would be 0 to 140. However, the scale itself is analyzed by breaking up the full 14 item scale into 2 parts - sedation and stimulation. Therefore, the total score for sedation ranges from 0 to 70, with higher scores indicating more sedation, and the total score for stimulation also ranges from 0 to 70, with higher scores indicating more stimulation. Timepoints: Administered 160 mins (M160) and 10 mins (M10) prior to the target ethanol/placebo dose being reached, when the target ethanol dose (BrAC of 0.1%)/placebo has been reached (0), and 15 (P15), 70 (P70), 90 (P90), and 150 (P150) minutes after the target ethanol/placebo dose has been reached.

Outcome measures

Outcome measures
Measure
Active Ethanol and Active Iomazenil
n=30 Participants
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp.
Active Ethanol and Placebo Iomazenil
n=31 Participants
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Placebo Ethanol and Active Iomazenil
n=32 Participants
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. Placebo: Control: no alcohol, administered for a total of 90 minutes.
Placebo Ethanol and Placebo Iomazenil
n=32 Participants
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Placebo: Control: no alcohol, administered for a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint M160)
3.767 score on a scale
Standard Deviation 6.826
3.935 score on a scale
Standard Deviation 7.771
3.813 score on a scale
Standard Deviation 7.368
3.194 score on a scale
Standard Deviation 5.431
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint M10)
4.767 score on a scale
Standard Deviation 5.74
4.484 score on a scale
Standard Deviation 6.623
3.438 score on a scale
Standard Deviation 5.853
3.968 score on a scale
Standard Deviation 7.092
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint 0)
5.267 score on a scale
Standard Deviation 5.271
5.258 score on a scale
Standard Deviation 6.153
2.875 score on a scale
Standard Deviation 5.74
3.452 score on a scale
Standard Deviation 6.35
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint P15)
7 score on a scale
Standard Deviation 7.409
5.677 score on a scale
Standard Deviation 7.368
6.75 score on a scale
Standard Deviation 8.74
3.387 score on a scale
Standard Deviation 6.249
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint P70)
7.2 score on a scale
Standard Deviation 11.075
6.806 score on a scale
Standard Deviation 9.393
3.469 score on a scale
Standard Deviation 6.17
2.516 score on a scale
Standard Deviation 5.092
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint P90)
4.9 score on a scale
Standard Deviation 6.088
5.677 score on a scale
Standard Deviation 8.89
2.875 score on a scale
Standard Deviation 6.384
1.452 score on a scale
Standard Deviation 3.491
Biphasic Ethanol Effects Scale (BAES)
Sedation Effects (Timepoint P150)
2.586 score on a scale
Standard Deviation 4.594
4.567 score on a scale
Standard Deviation 7.257
2.813 score on a scale
Standard Deviation 5.688
1.548 score on a scale
Standard Deviation 3.897
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint M160)
11.2 score on a scale
Standard Deviation 11.152
13 score on a scale
Standard Deviation 13.844
13.281 score on a scale
Standard Deviation 12.606
12.387 score on a scale
Standard Deviation 11.292
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint M10)
12.567 score on a scale
Standard Deviation 12.297
12.903 score on a scale
Standard Deviation 11.47
12.188 score on a scale
Standard Deviation 12.678
9.129 score on a scale
Standard Deviation 9.57
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint 0)
13.767 score on a scale
Standard Deviation 12.813
14.484 score on a scale
Standard Deviation 13.466
10.406 score on a scale
Standard Deviation 12.018
8.065 score on a scale
Standard Deviation 9.352
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint P15)
12.8 score on a scale
Standard Deviation 13.697
13.968 score on a scale
Standard Deviation 12.875
9.625 score on a scale
Standard Deviation 11.187
8.452 score on a scale
Standard Deviation 9.305
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint P70)
9.233 score on a scale
Standard Deviation 11.193
9.839 score on a scale
Standard Deviation 11.827
10.125 score on a scale
Standard Deviation 11.853
9.903 score on a scale
Standard Deviation 11.324
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint P90)
8.833 score on a scale
Standard Deviation 10.449
9.742 score on a scale
Standard Deviation 12.762
10.094 score on a scale
Standard Deviation 11.217
9.71 score on a scale
Standard Deviation 11.261
Biphasic Ethanol Effects Scale (BAES)
Stimulation Effects (Timepoint P150)
8.793 score on a scale
Standard Deviation 11.004
9.867 score on a scale
Standard Deviation 13.32
10.406 score on a scale
Standard Deviation 11.67
9.484 score on a scale
Standard Deviation 9.743

Adverse Events

Active Ethanol and Active Iomazenil

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

Active Ethanol and Placebo Iomazenil

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Placebo Ethanol and Active Iomazenil

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

Placebo Ethanol and Placebo Iomazenil

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

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Active Ethanol and Active Iomazenil
n=30 participants at risk
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp.
Active Ethanol and Placebo Iomazenil
n=31 participants at risk
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Ethanol: Target BrAC of 0.1% reached over 30 minutes and then clamped to maintain this dose for an additional 60 minutes. This dose is equivalent to consuming approximately 5 drinks. Administered over a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Placebo Ethanol and Active Iomazenil
n=32 participants at risk
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Active Iomazenil: Active iomazenil, administered intravenously at a dose of 3.7 ug/kg. Administered over 10 minutes, beginning 10 minutes after the start of the ethanol/placebo clamp. Placebo: Control: no alcohol, administered for a total of 90 minutes.
Placebo Ethanol and Placebo Iomazenil
n=32 participants at risk
Each participant will receive in a randomized, double-blind, cross-over design, ethanol or placebo and iomazenil or placebo. Potential randomizations for each test day: a) active ethanol and placebo iomazenil, b) active ethanol and active iomazenil, c) placebo ethanol and active iomazenil, and d) placebo ethanol and placebo iomazenil Placebo: Control: no alcohol, administered for a total of 90 minutes. Placebo: Control: no iomazenil, administered for a total of 10 minutes
Nervous system disorders
Lightheaded
0.00%
0/30 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/31 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
6.2%
2/32 • Number of events 2 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
Gastrointestinal disorders
Vomiting
6.7%
2/30 • Number of events 2 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/31 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
Gastrointestinal disorders
Nausea
6.7%
2/30 • Number of events 2 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/31 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
Nervous system disorders
Dizziness
3.3%
1/30 • Number of events 1 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
3.2%
1/31 • Number of events 1 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
3.1%
1/32 • Number of events 1 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
Gastrointestinal disorders
Stomach Cramps
0.00%
0/30 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/31 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
3.1%
1/32 • Number of events 1 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
Psychiatric disorders
Anxiety
0.00%
0/30 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/31 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
3.1%
1/32 • Number of events 1 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.
0.00%
0/32 • Adverse event data was collected beginning at the time of screening and for each of the four test days, through to the completion of the study. Follow up data was obtained at 1 week, 1 month, 6 months, and 1 year following the last test day.
Adverse events are reported for each test day condition.

Additional Information

Deepak Cyril D'Souza, MD

VA Connecticut Healthcare System

Phone: 203-932-5711

Results disclosure agreements

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