for males ages 18-70 (full criteria)
healthy people welcome
study started
estimated completion



This is a double-blind, placebo-controlled trial of 120 binge-drinking MSM to 12 weeks of naltrexone 50mg, to be taken in anticipation of heavy drinking. Ethnically and racially diverse participants will be recruited using Respondent Driven Sampling as well as active field recruitment. MSM will be seen weekly for alcohol-metabolite urine testing, study drug dispensing, and brief counseling for alcohol use. Safety assessments and behavioral surveys will be completed monthly.


Binge Drinking HIV Naltrexone


You can join if…

Open to males ages 18-70

  • (1) Male gender (2) self-reported anal sex with men in the prior three months while under the influence of alcohol (3) at least one binge drinking (five or more drinks on a single occasion) session per week in the prior three months; (4) interested in reducing binge alcohol consumption; (5) HIV-negative by rapid antibody test or medical record documentation of HIV infection (HIV positive participants); (6) no current acute illnesses requiring prolonged medical care; (7) no chronic illnesses that are likely to progress clinically during trial participation; (8) able and willing to provide informed consent and adhere to visit schedule; (9) age 18-70 years; (10) baseline CBC, total protein, albumin, glucose, alkaline phosphatase, creatinine, BUN, and electrolytes without clinically significant abnormalities as determined by study clinician in conjunction with symptoms, physical exam, and medical history.

You CAN'T join if...

  • (1) Any psychiatric (e.g. depression with suicidal ideation) or medical condition that would preclude safe participation in the study; (2) known allergy/previous adverse reaction to naltrexone; (3) current use of/ dependence on any opioids or a known medical condition which currently requires/may likely require opioid analgesics; (4) opioid-positive urine at enrollment; (5) current CD4 count < 200 cells/mm3 (6) moderate/severe liver disease (AST, ALT > 3 times upper limit of normal); (7) impaired renal function (creatinine clearance < 50 ml/min); (8) currently participating in another intervention research study with potential overlap; (9) alcohol dependence as determined by SCID criteria (participants with non-dependent alcohol use disorders/symptoms of alcohol abuse [per DSM-IV] are eligible) (10) any condition that, in the principal investigator and/or study clinician's judgment interferes with safe study participation or adherence to study procedures; (11) not having a cell-phone that can send and receive text messages.


  • Substance Use Research Unit accepting new patients
    San Francisco California 94102 United States


accepting new patients
Start Date
Completion Date
University of California, San Francisco
Phase 2
Study Type
Last Updated