[61] observed no difference in postoperative analgesic outcome of oxycodone amongst the PM and EM of CYP2D6 All authors contributed into the drafting in the work and revising it critically for content. All authors have reviewed and approve of this manuscript for submission. All authors conform to be accountable for https://wockusa.com/product/quagen-promethazine-hcl-and-codeine-phosphate-oral-solution/