Naltrexone is a long acting opioid receptor antagonist used to treat inflammatory and acantholytic dermatologic conditions at low doses (1 5 mg dose) and itch at both low and higher doses. This study found low dose Bupropion for Smoking Cessation in Patients Hospitalized With Acute Myocardial Infarction: A Randomized, Placebo Controlled Trial ScienceDirect Phentermine PeterMD This little yellow pill blocks the brain receptors that make alcohol feel rewarding. And it's been around since 1994.It's called naltrexone. Most people have never heard of it because it was never