Only users lose drugs.
Is it ok to do drugs during a chess game?

It's not only okay, but it's considered rude to snort a line of coke without offering some to your opponent. As long as you do it on your time and not his, you should be fine.

Discussions involving illegal activities, including illegal drugs, are explicitly forbidden in the ToS (https://www.chess.com/legal) and in the posting guidelines (per Erik: https://www.chess.com/forum/view/community/making-the-chesscom-forums-better)
For that reason, I locked this thread. If anyone considers my interpretation to be wrong or unfair, just contact jdcannon by message or the support team via a ticket).
If you play against me, I strongly encourage you to do as much cocaine and weed as you like!