After a party this weekend I was checking my pockets and in my jacket was a tin of Altoids with two half-blue, half-white pills. They are oval, and the blue half is ribbed, or scored, with four raised bars. There are no other markings. I think they're probably mints, but as they were inside of an Altoids tin I'm not sure if they smell minty on their own or if it was from sitting with a bunch of Altoids. Does anyone know what this is? Thank you so much for your help.