I"m sorry to tell you this but i think it is hydrocodone
My son is addicted to hydrocodone i found M358 pills on him once and they were 7.5 mg hydrocodone so i think the one you are asking about is a 5 mg hydrocodone. (note... very habit forming......)please search futher to be sure i'm right .
This pill is
Hydrocodone Bitartrate 5 mg and Acetaminophen 500 mg
Generic for: LortabÃ‚Â®,VicodinÃ‚Â®
Description: White Capsule Shaped Tablet
Identification Code: Debossed M357; bisect on reverse side
You will find an image at http://pharmaceuticals.mallinckrodt....ProductID=5488