OxyContin is an oral solid dosage form containing oxycodone hydrochloride as its active pharmaceutical ingredient (API). The 80mg tablet is a high-strength formulation within the product line. Its defining technical feature is a patented controlled-release (CR) delivery system designed to provide a prolonged therapeutic effect. The tablet’s matrix is engineered to release oxycodone over an approximate 12-hour dosing interval through a combination of diffusion and erosion mechanisms, aiming to maintain stable plasma concentrations and reduce peak-to-trough fluctuations compared to immediate-release formulations. It is bioequivalent to corresponding total daily doses of immediate-release oxycodone administered every 6 hours. This formulation is indicated for the management of severe, around-the-clock pain requiring continuous, long-term opioid treatment in opioid-tolerant patients only. The tablet must be swallowed whole and must not be crushed, chewed, or dissolved, as this would disrupt the controlled-release mechanism, leading to the rapid release and absorption of a potentially fatal dose of oxycodone.