tramadol and drug test

Information about Tramadol:

Tramadol is a synthetic stripped-down piperidine-analog of the phenantherane alkaloid codeine and, as such, is an opioid and also a pro-drug (codeine is metabolized to morphine, tramadol is converted to M-1 aka O-desmethyltramadol). Opioids are chemical compounds which act upon one or more of the human opiate receptors (the euphoria, addictive nature and respiratory depression are mainly caused by the Mu(?) 1 and 2 receptor. The opioid agonistic effect of Tramadol and its major metabolite(s) are almost exclusively mediated by the substance's action at the opioid receptor. This characteristic distinguishes tramadol from many other substances (including morphine) of the opioid drug class, which generally do not possess tramadol's degree of subtype selectivity.

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