following oral administration of a single 75-mg dose of amitriptyline to two subjects , the mean plasma levels of amitriptyline , nortriptyline , 10-hydroxyamitriptyline , conjugated 10-hydroxyamitriptyline , 10-hydroxynortriptyline , and conjugated 10-hydroxynortriptyline were 36 , 8 , 10 , 66 , 16 , and 46 ng/ml , respectively , at 2 hr after dosing and 3 , 4 , 0.5 , 1 , 6 , and 17 ng/ml , respectively , at 72 hr after dosing .
C0002600
amitriptyline
C0028420
nortriptyline