Basically Nashville (1975) with cigarettes, or Skidoo (1969) without the acid.
This is Norman Lear, so its hopelessly liberal, but still: a black-hearted curio that captures the mood of the Nixon era so well, it isn’t really funny to watch (if you survived it…)
Cold Turkey will probably seem especially weird to young people who don’t remember a time when most people smoked.
(And when movie directors still thought audiences actually enjoyed mob slapstick set to dorky canned music. Cold Turkey reflects that old fashioned, top down, out of touch studio model of moviemaking that was being swept aside, at that very moment, by Dennis Hopper and friends.)