Back to top Home News U.roulette sniper 2.0 strategy ONLINE ROULETTE GAME DOWNLOAD A National Problem Gambling Clinic spokesman said it has treated five people with naltrexone since it began trialling the drug in November. Kim SW, Grant JE, et al. Double-blind naltrexone and placebo comparison study in the treatment of pathological gambling. Biol Psychiatry. ;49(11) A Double-Blind, Placebo-Controlled Study of the Opiate Antagonist Naltrexone in the Treatment of Pathologic Gambling Urges.