Pill Identification needed please.
It is round. It is a darker blue color. It is about 2/3 cm. It has one blank side with no imprint. On the other side it is imprinted with 361. It is a very old pill from many years ago. The search results online only bring up hydrocodone acetometaphen pills that are blue oblong and marked M361. There is no M on the ones that are needing the identifying and they are not oblong in shape they are round. The pdr book researched was one that would identify older medications, but it too did not have any positive results for identification.
Does someone know what these are? Identifying them is out of sheer curiousity, not for any purpose other than to identify the drug itself.