Serotonin syndrome: Circumstances of serotonin syndrome, a potentially life-threatening problem, have been documented throughout concomitant usage of opioids with serotonergic drugs. The concomitant utilization of acetaminophen and codeine phosphate tablets with all cytochrome P450 2D6 inhibitors (e.g., amiodarone, quinidine) may well end in an increase in codeine plasma concentration... https://webdirectoryone.com/listings13182734/codeine-in-english-options