Displaying 4 results of Trihexyphenidyl Stable Isotopes Trihexyphenidyl stable isotopes are non-radioactive forms of the medication trihexyphenidyl, which is used to treat Parkinson's disease and other movement disorders. These isotopes have the same chemical properties as the regular medication but have a different number of neutrons in the nucleus, making them useful for research and diagnostic purposes. Trihexyphenidyl stable isotopes are important tools for scientists studying the pharmacokinetics, metabolism, and biodistribution of the medication in the body.