Not sure what else to add. I found these in my son's room and want to know what they are. I saw a post from last year that described the exact same thing. But it didn't look like anyone had been able to tell what they were. I wondered if they were "hangover" pills to help absord alcohol. I did stick one to my tongue and it was bitter/salty. They don't have any speckles. They are just a flat gray color. They aren't coated because they leave residue on your hand. I'm sure they weren't bought in a pharmacy. They aren't in a medicine bottle - just in a brown glass bottle with a white screw-on top. Thanks for any help!