found these pills in my cousins room and want to know what they are. Actually there were 2 different kinds in one medicine bottle with no label on it.

Pill 1: white tab 54409 on 1 side / 30 on the other
Pill 2: white tab w/ 512 on one side and just a line on the other to break it in half I believe.

Anyone have any ideas?? I thought they may be generic if they weren't listed on the site.