The purpose of the study is to determine if the hormone progesterone affects marijuana users' stress response and marijuana use. Participation lasts approximately three weeks. During the first week, participants are randomly assigned to take either progesterone or placebo and remain abstinent from marijuana. They return at the end of the week to participate in a stress task. Throughout the three weeks, participants complete "CREMA" sessions (Cue Reactivity Ecologic Momentary Assessment) three times a day. These sessions include looking at stressful and neutral pictures and rating stress and craving.
This study will examine whether the investigational medication PF-0447845 is safe and effective in reducing cannabis use among people who frequently use cannabis. This is a 12-week, randomized, double-blind, placebo-controlled outpatient clinical trial that will be conducted at 4 research sites in the eastern U.S.
Marijuana is the most commonly used illicit drug. There is high demand for effective interventions for cannabis use disorder, yet few specific treatments for have been developed. This study will evaluate the efficacy of varenicline for reducing marijuana use in people who use marijuana frequently.
Social stress often leads to drug craving and relapse in cocaine-dependent populations. Currently there are no FDA approved medications for the treatment of cocaine dependence. Therefore, biomedical research studies aimed at investigating the brain mechanisms responsible for controlling emotional responses to social stress could have a significant impact on the development of effective therapeutic treatment strategies for cocaine-dependent individuals.