Compatibility of tramadol hydrochloride injection with selected drugs and solutions.

Tramadol hydrochloride is a centrally acting synthetic analgesic with a dual mechanism of action.[1][1],[2][2] Tramadol and its O -desmethyl metabolite (M1) bind to opioid receptors, with M1 having a 200-fold higher affinity for binding to these receptors. Tramadol has also been shown to inhibit the