Tramadol and its metabolite, O-desmethyltramadol (M1), are existing in human milk. There is absolutely no info on the results of the drug on the breastfed infant or the consequences of your drug on milk manufacturing. The M1 metabolite is much more powerful than tramadol in mu opioid receptor binding [see https://emilianorohyn.blogzet.com/cocodamol-30mg-an-overview-52132105