Irvine Welsh Acid House", where the minds of a baby and a drug user swap bodies, or "The Granton Star Cause", where God transforms a man into a fly as punishment for wasting his life. Welsh adapted three of the stories for a later film of the same name, in which he also appeared. Welsh's third book (and second novel), "Marabou Stork Nightmares", alternates between a grim tale of thugs and schemes in sub-working class Scotland and a hallucinatory adventure tale set in South Africa. Gradually, common themes emerge. His next book, "" (1996), became his most high-profile work since "Trainspotting", released
Heroin users, compared to morphine, reportedly stems from its perceived different effects. Short-term addiction studies by the same researchers demonstrated that tolerance developed at a similar rate to both heroin and morphine. When compared to the opioids hydromorphone, fentanyl, oxycodone, and pethidine (meperidine), former addicts showed a strong preference for heroin and morphine, suggesting that heroin and morphine are particularly susceptible to abuse and addiction. Morphine and heroin were also much more likely to produce euphoria and other positive subjective effects when compared to these other opioids. In the United States, heroin is not accepted as medically useful. Under the generic