CLICK HERE TO BUY HYDROCODOME M367 Hydrocodone M367 is a prescription pain medication commonly used to treat moderate to moderately severe pain. The imprint “M367” identifies a white, capsule-shaped tablet manufactured by Mallinckrodt Pharmaceuticals. It contains a combination of hydrocodone bitartrate (10 mg), an opioid analgesic, and acetaminophen (325 mg), a non-opioid pain reliever and fever reducer. Together, these ingredients work to enhance pain relief by affecting how the brain perceives pain while also reducing inflammation and discomfort.