following administration of a single oral dose ( 25 mg ) of amitriptyline hydrochloride to two human subjects , no unchanged drug was found in any of the urine samples analyzed up to 72 hr after dosing , and only small amounts of nortriptyline and desmethylnortriptyline were observed .
C0700523
amitriptyline hydrochloride
C0028420
nortriptyline