Mavoglurant in Alcohol Drinking

The following specific aims will be tested: Aim: To evaluate the safety and tolerability of mavoglurant when used in combination with a moderate dose of alcohol in healthy social drinkers. Specific Aim 1: To evaluate the effect of mavoglurant on blood chemistries, urine toxicology and physiological safety measures before and after alcohol administration. Specific Aim 2: To evaluate the interactions of alcohol and mavoglurant on blood alcohol levels and mavoglurant levels. Exploratory Aim: To explore the effects of mavoglurant on alcohol responses, including stimulation, sedation, intoxication, and cognitive/motor performance.

Inclusion Criteria:

1. Ages 21-50
2. Able to read English at 6th grade level or higher and to complete study evaluations
3. Social drinkers
4. Willing to abstain from drinking alcohol during the outpatient study medication treatment period

Exclusion Criteria:

1. Seeking treatment for alcohol drinking
2. Current DSM-V criteria for any other substances, other than alcohol or nicotine.
3. Positive test results at any appointments after the initial intake appointment on urine drug screens conducted for opiates, cocaine, marijuana, benzodiazepines and/or barbiturates.
4. Regular use of psychoactive drugs including anxiolytics and antidepressants.
5. Psychotic or otherwise severely psychiatrically disabled.
6. Any medical conditions (including hepatic and renal impairment) that would contraindicate the consumption of alcohol or administration of mavoglurant.
7. History of neurological trauma or disease, delirium, or hallucinations, or any significant systemic illness or unstable medical condition.
8. Women who are pregnant, nursing, or refuse to use a reliable method of birth control. Urine pregnancy tests will be completed at intake and prior to administration of alcohol at each lab session.
9. Subjects who report disliking spirits will be excluded because hard liquor will be provided during the alcohol administration.
10. Subjects who have taken any investigational drug and/or participated in another study which involves additive blood sampling and/or interventional measures that would be considered excessive in combination with the current protocol within 4 weeks immediately preceding admission to the treatment period.
11. Subjects who report any daily drug use during the 30 days prior to randomization for the following: anxiolytics, beta blockers, central nervous system stimulants, hypnotics, non-therapeutic doses of neuroleptics and antidepressants, drugs with psychotropic activity or drugs which cause excessive sedation.
12. Subjects who have donated blood within the past six weeks.
13. Subjects who have taken, within the prior 14 days, the following strong inhibitors or inducers of CYP1A, CYP2C, and CYP3A and CYP3A4: ciprofloxacin, enoxacin, fluvoxamine; gemfibrozil; fluconazole, fluvoxamine, ticlopidine; boceprevir, clarithromycin, conivaptan, grapefruit juice, indinavir, itraconazole, ketoconazole, lopinavir/ritonavir, mibefradil, nefazodone, nelfinavir, posaconazole, ritonavir, saquinavir, telaprevir, telithromycin, voriconazole; bupropion, fluoxetine, paroxetine, quinidine; avasimibe, carbamazepine, phenytoin, rifampin, and St. John's wort. We will also exclude individuals who have taken, within 14 days, the following moderate inhibitors and inducers of CYP3A: Amprenavir, aprepitant, atazanavir, ciprofloxacin, crizotinib, darunavir/ritonavir, diltiazem, erythromycin, fluconazole, fosamprenavir, imatinib, and verapamil; and bosentan, efavirenz, etravirine, modafinil, and nafcillin.
14. Current use of warfarin.
15. Use of any medications that are contraindicated with mavoglurant and alcohol.
16. AST, ALT, total bilirubin >1.5 times upper normal; serum creatinine, >2 times upper normal limit, total bilirubin>1.5 times ULN; Serum creatinine >2.0 times ULN.