Description: Round white pill indexed with "M" placed inside a square on one side and "594" debossed on the other Active Ingredient: Oxycodone hydrochloride Strength: 20mg Manufacturer: Mallinckrodt Pharmaceuticals Available Brand Names: OxyContin

M 594 pill is a generic version for name brand OxyContin manufatured by Mallinckrodt Pharmaceuticals. OxyContin's generic name is Oxycodone hydrochloride.

Oxycodone hydrochloride is an opioid pain reliever closely related to morphine.

Each M 594 pill contains 20 mg of pure Oxycodone hydrochloride.

Mallinckrodt pills with "M 594" index are used to relieve moderate to severe pain.