codeine + oxycodone + IRcodone + tramadol

This is a combination of four opioid analgesics—codeine, oxycodone, IRcodone (no recognized pharmaceutical agent by this name), and tramadol. Codeine and oxycodone are classic opioids that act primarily as mu-opioid receptor agonists to provide analgesia for moderate to severe pain. Tramadol is a synthetic opioid with dual mechanisms of action; it acts as a weak mu-opioid receptor agonist and also inhibits the reuptake of serotonin and norepinephrine, contributing to its analgesic effects[1][3][4][5]. The combination would theoretically provide multimodal pain relief but significantly increases the risk for additive central nervous system depression, respiratory depression, overdose, dependence, and other serious adverse effects[2][7]. There is no evidence that such a four-drug combination exists as an approved or marketed product.