Haha... cigarettes
I've been an alcoholic for 12 years, and that coincided with 'mild' opiate use (kind of as prescribed) Opiates came in and out of my drug world, as available, alcohol was omnipresent. Coming off alcohol at first was masked by opiates, and coming off opiates was masked by more alcohol and stimulants... so my reflections there are pretty murky. Of everything I've quit though, I have the strongest and most frequent urges for cigarettes...