Should I Tell Him?

So one of my male friends was talking to me. I said I was cramping. He's the type of guy I can say that stuff too because he doesn't get grossed out or anything. He said "Oh my girlfriend takes chlamydia pills to help with cramping ". I just say "What?" He said "She had a bottle of pills that were for chlamydia, and said they help with cramps" uhhhhhhhhh I should tell him right? Like someone needs to tell him.