Tramadol and its metabolite, O-desmethyltramadol (M1), are current in human milk. There is not any info on the effects with the drug about the breastfed toddler or the results from the drug on milk generation. The M1 metabolite is much more strong than tramadol in mu opioid receptor binding [see https://samuela653rze9.digitollblog.com/profile