I just found out what it is - it's a Lexapro 20 mgs. But thanks so much for your kind help. The pill has an F on one side of the score mark and an L on the other side of the score mark - then on back side it has "20". I found a doctors sample box of them in one of her drawers and sure enough - that's what it was. I knew she was on an antidepressant, just didn't know what all these loose pills in her bag were. Now I do.