Tramadol and its metabolite, O-desmethyltramadol (M1), are present in human milk. There's no information on the effects in the drug to the breastfed toddler or the results on the drug on milk creation. The M1 metabolite is a lot more potent than tramadol in mu opioid receptor binding [see Scientific https://benitoh531lrv6.laowaiblog.com/profile