It's made in 500/5 mg and 325/5 mg.
They put the acetaminophen in there to destroy your liver and kill you if you take too much of the Oxy.
Close, but no cigar; this tablet is a generic version of Vicodin, a mild narcotic painkiller containing not 5mg.of oxycodone, but hydrocodone. The “M” part of the imprint denotes the manufacturer, which is Milan. The identifier 357 denotes the 5mg.version, 358 the 7.5mg.version, and 360 is the 10mg.version.
The 5/325 sounds familiar.