Overview Pharmacokinetic Evaluation of Intranasal, Intramuscular, and Oral Naltrexone in Healthy Volunteers Status: Completed Trial end date: 2016-09-01 Target enrollment: Participant gender: Summary To determine the pharmacokinetics of 2 intranasal doses and 1 oral dose of naltrexone compared to an intramuscular dose of naltrexone. Phase: Phase 1 Details Lead Sponsor: National Institute on Drug Abuse (NIDA)Treatments: Naltrexone