If by a med you mean something recommended by a doctor, then 1 aspirin a day, because I had a couple of TIAs (I think they're called) a few years ago.

I have some Viagra, in case I meet someone who wants to get fucked.

Also I put some antibiotic in my ears every morning, to forestall lowgrade infections, and some antipruritic (but I scratch them anyway). And lotion on my fingers & feet.

The only psychotropic drugs I use are caffeine in the morning & alcohol in the evening. They happen to be legal & available without prescription. I suppose that won't last forever, but neither will I.