I'm a huge fan of forced intox.

I find alcohol is usually my least favorite intoxicant for this type of play -- weed and poppers seem to work better. Poppers are horrible for you if used regularly but for play every once in a while they're fine.

My slave is an enormous fan of pantyhose so I pour the poppers on my stocking feet and have him huff from there.

We also play a game with spliffs where he's not allowed to exhale until I tell him he can. I generally smoke with him which makes it even more fun, since I'll get a little stoned and forget to tell him to breathe. Of course sometimes I just have him hold it for a long time to torture him, and often smother him with my hands or feet during. It's nice to have the little ritual going even when we're just chitchatting outside of session -- keeps him from forgetting his place.

Once I plastic wrapped my heel onto his face and exhaled my smoke into it to create a kind of hotbox. It was a spur of the moment idea that ended up working far better than expected. He was all wrapped in plastic, on his knees with my shoe covering his mouth and nose, breathing in my scent and the smoke from my lungs. Glorious.

Many years ago we did a session where we took a break for dinner halfway through and I ordered him strong drinks and shots throughout. Tremendously fun in the moment but he was absolutely wrecked when we got back. Since then we've avoided too much play with alcohol.