small, white round tablet. No score mark, with an 'M' on one side and a '4' on the other
Is the M in a box like [M]?
I'm not a pharmacist or a medical doctor. This message is not medical advice nor is it an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.
Sounds like Hydromorphone 4 mg by Mallinckrodt
Generic for: Dilaudid®
Description: White/Round Tab
Identification Code: Debossed with M one side; 4 on the reverse side