I Found A Small Capsule On My Kitchen Floor And

I found a small capsule on my kitchen floor and I can't identify what it is. It was a small, peachy colored capsule that had I think an A and some two other letters in black, also it had 12? on it. I think it may have been a generic heartburn med. but I'm not sure. I wasn't thinking and threw it down the drain before looking it up. I am a little concerned because I have no idea where it came from.