Dr. Duesberg observed that critical AIDS cases in the 1980s were among men engaged in behaviors then commonplace in the post-Stonewall, drug-charged gay party scene. Risk factors included promiscuous sex with multiple partners and cumulative toxic exposures from psychoactive drugs including methedrine, cocaine, heroin, LSD, and a cocktail of antibiotics prescribed to treat ubiquitous sexually transmitted diseases. On average, the early AIDS patients had been on at least three antibiotics courses in the year preceding diagnosis.

