I found what seems to be a capsule in my daughter's room on the floor. It is an odd shape; looks like capsule but with a ridge the whole way around the pill. It is red, gray and yellow. It appears to be quite hard. On the red portion it has a # I cannot read and on the yellow portion it has either an "A" or a "4" a dash and "M5" or "3". It looks illegal; can anyone help me? It is a day the pharmacies are closed; thanks!!