What is the difference beween the white Oxycodone 30mil with p r 30 imprint and amp the blue 30mil with the V imprint?

The white Oxycodone 30mg with "P R 30" imprint is produced by Pharmacist's Mutual and is a generic version of the brand-name Roxicodone. The blue 30mg with "V" imprint is produced by Qualitest Pharmaceuticals and is a generic version of the brand-name OxyContin. Both medications contain oxycodone, but may have different inactive ingredients which can affect how they are absorbed and metabolized in the body.