Unless it's a special med, I always assume there's slack so I take expired pills but not forever.I got some scripts filled yesterday and I was looking at one of the boxes and it expires 01/24 so I just took it back to the chemist. She said to me it's still in date and I said yeah for 2 days and it's a months worth of pills. So she goes gets me another box and places the expired box back. I guess the next person will get it.