Displaying 3 results of Milnacipran Stable Isotopes Milnacipran Stable Isotopes are non-radioactive isotopes of the drug Milnacipran. These isotopes have the same chemical and physical properties as the regular isotopes of the drug but have a different number of neutrons in the nucleus. They are used in research and development to study the pharmacokinetics and metabolic pathways of the drug. These stable isotopes are also used as internal standards for quantification in drug analysis.