Ofpain is a member of the pyrrolo-pyrrole group of the non-steroidal anti-inflammatory drugs (NSAIDs). It inhibits the cyclo-oxygenase enzyme system and hence prostaglandin synthesis. Ofpain is not an anesthetic agent and possesses no sedative or anxiolytic properties; therefore it is not recommended as a preoperative medication for the support of anesthesia when these effects are required. It is not an opioid and has no known effects on opioid receptors.