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Review
. 1994 Jan;10(1):18-46.
doi: 10.2165/00002018-199410010-00003.

Comparative tolerability profiles of the newer versus older antidepressants

M V Rudorfer  1 , H K Manji, W Z Potter
Affiliations
Review

Comparative tolerability profiles of the newer versus older antidepressants

M V Rudorfer et al. Drug Saf. 1994 Jan.

Abstract

Although the standard tricyclic antidepressants (TCAs) are generally effective in the treatment of depression, they can cause several troublesome adverse effects. Chief among these are their anticholinergic actions, which range from annoying dryness of the mouth and constipation to potentially dangerous urinary retention and confusion or delirium in the ill and elderly. Cardiovascular effects of TCAs include orthostatic hypotension, tachycardia and cardiac conduction slowing. Many TCAs are sedating and promote weight gain. Also problematic is the potential lethality of TCAs in overdose. The continual introduction of a host of new antidepressants over the past 15 years has provided an opportunity to improve the benefit-risk ratio for many patients by reducing medication-related toxicity. Selective serotonin reuptake inhibitors (SSRIs) and amfebutamone (bupropion), among others, are examples of effective antidepressants free of tricyclic-like anticholinergic, cardiovascular, sedating and appetite/weight-increasing effects. However, the new-generation drugs also present adverse effects of their own, including gastrointestinal distress, agitation and drug-drug interactions in the case of the SSRIs, and the risk of seizures or psychosis in amfebutamone recipients. Monoamine oxidase (MAO) inhibitors have also been refined; reversible inhibitors of MAO-type A afford protection against the usually feared hypertensive reaction to indirect sympathomimetic substances. The availability of new-generation antidepressants thus increases the likelihood of clinical response with a reduction in unwanted toxicity.

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