Which class of antidepressants is known for anticholinergic side effects?

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Tricyclic antidepressants (TCAs) are known for causing anticholinergic side effects due to their chemical structure and mechanism of action. These medications, which include drugs such as amitriptyline and amoxapine, not only inhibit the reuptake of norepinephrine and serotonin but also block muscarinic acetylcholine receptors. This blockage is responsible for a range of anticholinergic side effects, such as dry mouth, constipation, urinary retention, blurred vision, and cognitive impairment.

These side effects can be significant in clinical practice, particularly in older adults or patients with pre-existing conditions that may be exacerbated by anticholinergic activity. Understanding the side effect profile of TCAs is crucial for healthcare providers when selecting appropriate treatments for their patients, especially considering potential drug-drug interactions and the individual health status of the patient.

In contrast, other classes of antidepressants, such as selective serotonin reuptake inhibitors, monoamine oxidase inhibitors, or norepinephrine-dopamine reuptake inhibitors, generally do not exhibit this level of anticholinergic activity, making TCAs distinctive in this aspect.

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