I have a pill with 4 M but how do i know if its tylenol w codine or hydromorphone? no square around my 4 but it looks diff than codine
Sounds to me like you have the hydromorphone tablet. Note - the square that most easily differentiates the two would be around the M, not the 4.
Also, the picture on this website seems a little yellowish to me. To my memory, the hydromorphone M4 tablet is white.
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