Roxicodone 30 mg (M 30 pill) is a branded opiate analgesic, usually referred to by its generic name Oxycodone Hydrochloride. It is intended for the management of moderate to severe pain in patients who require treatment with an oral opioid analgesic. White Rounded M 30 pill is the best treatment for treating severe pain (cancer pain, surgery pain, and injury-related pain). This opioid is effective when non-opioid painkillers are not successful in controlling pain or are ineffective.