It sounds like you're referring to the 1996 film , directed by Danny Boyle and based on the novel by Irvine Welsh.
The film’s visual energy (quick cuts, whip pans, close-ups of needles and veins, the ceiling falling toward Renton during overdose) turns withdrawal and shooting up into thrilling cinema — not to glamorize, but to put the viewer inside the addict’s head. trainspotting 1
Trainspotting part one (the first half of the film or the first act of the saga) ends not with recovery, but with Renton nearly dying from an overdose, saved by his long-suffering parents. The aftermath is cold-turkey withdrawal — shown as a fever nightmare with a dead baby crawling on the ceiling. It sounds like you're referring to the 1996
It’s a wake-up call. But in Trainspotting , wake-up calls are just pauses before the next hit. Would you like a piece (covering T2: Trainspotting , 2017) or a creative reinterpretation of a scene from part one? The aftermath is cold-turkey withdrawal — shown as