Oxycodone 5 mg (K 18 pill) is an opioid substance drug, and it belongs to the opioid analgesics drug class. K18 pill is a generic variant of brand-name drugs OxyContin, Oxyfast, Roxicodone, RoxyBond, etc. The Food and Drug Administration (FDA) approved Oxycodone Hydrochloride 5 mg immediate-release (IR) and extended-release (ER) formulations to be used in different cases. The IR variant is approve