Tramadol and its metabolite, O-desmethyltramadol (M1), are current in human milk. There isn't a information on the effects on the drug within the breastfed toddler or the results from the drug on milk generation. The M1 metabolite is more potent than tramadol in mu opioid receptor binding [see Medical Pharmacology https://dihydrocodeine-30-mg91356.blogtov.com/17910693/about-sleeping-tablets-zopiclone-7-5mg