the incidence of potentially toxic serum levels ( greater than or equal to 400 ng/ml ) was analyzed in a group of 196 monitored patients on a standard dosage regimen ( 75-225 mg/day ) of several antidepressants : imipramine , amitriptyline , nortriptyline , maprotiline and clomipramine .
C0003289
antidepressants
C0028420
nortriptyline