Normal stuff like ntibiotics, etc... yes. Narcotics, AAS- better be careful.
Funny story...
I was in Austin on a business trip when I got slammed by a recurrent kidney stone. I cannot begin to describe the pain and I had to get on a plane on top of that. I went into a pharmacy sweating bullets and writhing in pain, asked for the pharmacist, and proceeded to write myself a prescription for Vicodin. He looked at me cross-eyed, like "WTF are you thinking?"
To which I said, "I've got a fucking kidney stone and I'm getting on a plane in 30 minutes you fuckety fuck fuck piss ant. Get me the fucking Vicodin NOW!!!!!!!" He got it, I took it in front of him, and proceeded to puke it up 15 minutes later in the airport bathroom.