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  • Title: The methylphenidate test for differentiating desipramine-responsive from nortriptyline-responsive depression.
    Author: Sabelli HC, Fawcett J, Javaid JI, Bagri S.
    Journal: Am J Psychiatry; 1983 Feb; 140(2):212-4. PubMed ID: 6849437.
    Abstract:
    Monitoring tricyclic antidepressant concentrations in the plasma of 43 patients with major depressive disorders indicated that some responded to imipramine or desipramine but not to amitriptyline or nortriptyline, or vice versa, even though plasma levels were within therapeutic ranges. Mood elevation by methylphenidate predicted marked improvement from treatment with imipramine or desipramine but not with amitriptyline or nortriptyline. When methylphenidate failed to improve mood, patients responded to amitriptyline or nortriptyline but not to desipramine. These results suggest differential drug responses with different tricyclic antidepressants, the clinical utility of the methylphenidate test, and the heterogeneity of depressions. The authors question the mechanism of action of nortriptyline via blockade of norepinephrine reuptake.
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