There is a scene where the main character takes a glass bottle away from a house which is presumed to be wine, but he never drinks it. No illegal drug use in the film, but syringes and prescriptions are shown and/or used.
Rats and diseased humans are used for laboratory tests in the film where they receive vaccines which may cure a debilitating virus. The rats show up toward the beginning of the film, and a diseased human is tested with a vaccine during the middle of the film.