steady-state nortriptyline plasma levels were determined in eight patients at 9 am , 12 pm , 3 pm , and 6 pm during treatment with nortriptyline hydrochloride administered as a single daily bedtime ( hs ) dose at 10 pm and repeated after changing the dosage schedule to three times a day ( tid ) with divided doses at 10 am , 4 pm , and 10 pm .
C0028420
nortriptyline
C0700459
nortriptyline hydrochloride