Momentum

Generic Name: Magnesium Salicylate Tetrahydrate
Strength: 580 mg
Manufacturer: Medtech Products
Trade Name: Momentum
Type: Analgesic
Class: OTC
Size (mm): 16 X 8 X 6
Comment: Image courtesy of tabletpharmer.  Reverse side of tablet is plain.

Not to be confused with Methylsulfonylmethane (MSM), a dietary supplement