title: The double-blind crossover trial design: how good is it for psychoactive drugs?
mesh_terms: D000328:Adult; D003496:Cyclazocine / Q000009:adverse effects* / Q000627:therapeutic use; D004311:Double-Blind Method; D006801:Humans; D008297:Male; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000009:adverse effects* / Q000627:therapeutic use; D009293:Opioid-Related Disorders / Q000534:rehabilitation*
chemical_list: D009270:Naloxone; D009271:Naltrexone; D003496:Cyclazocine