I figured you drugged up fuckers could help me out with something, I need to know what kind of pill is brown has an M in a square on one side and 30 on the other.

I have gotten answers including anything ranging from ritalin, to oxymorphine, to ms contin. I am thinking its a generic MS Contin 30 mg... but I need to know for sure.

I found it in my friends drawer, hes in rehab and I need to know if hes using again.