The pill you have sounds like
Methocarbamol Tab 750 MG
Imprint 1: 4212
Imprint 2: V
Color: white
Shape: oblong
Methocarbamol is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.
Methocarbamol is used, along with rest and physical therapy, to treat injuries and other painful muscular conditions.
You will find more information on this drug at:
http://methocarbamol.drugs.com