Caffeine and sugar (Yes, they are addictive drugs, especially... sugar) I overuse.
I have smoked a few cigars, drank a few beers. Once or twice I tried to get drunk, without actual success.
First alcohol experience, a man wanted to molest me, gave me a beer from his fridge that was already open. I drank half of the half, felt a sense of impending doom--which I felt if and only if I 'opened' myself emotionally in his vicinity -- and got the DEVIL out of there.
I used Adderall (ADHD prescription stimulant) on the idea that it would settle me and allow me to focus, for a few days at the behest of an aunt. After all, she had been a nurse (lost the right to be a nurse due to mishandling drugs, I later learned.) Found it calming to the point of boring me, but I also was far more decisive. I also felt like I was having a psychic ability -- knew people were coming before they arrived. What really happened was (hypothesis) that I wondered if anybody was coming -- which I never do because I usually am too wrapped up in daydreams -- and yes, somebody was. Poof: instant psychic phenomena, just like the carnivals use.
Passed the pipe when offered Marijuana, because: illegal.
Didn't ever use my narcotics when prescribed by the dentist; I coped plenty well with ibuprophen.