Cigarettes are one of the confirmed consumable items in GTA 6. They fit the everyday world Rockstar builds around the characters rather than a combat or crafting system. Rockstar has not shared any stats or effects, so it is best to treat this as a small flavor item for now.
Cigarettes are confirmed to be present in GTA 6 as a consumable, likely picked up or bought at stores like similar items in past games. Rockstar has not detailed exact effects, so we cannot promise any specific benefit. Expect them to add to the world's texture more than the mechanics.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.