Real Life Pharmacology - Pharmacology Education For Health Care Professionals

Vilazodone (brand name Viibryd) is an antidepressant with a unique pharmacologic profile compared to most other agents in the SSRI class. While not a first-line choice for every patient, understanding its mechanism, adverse effects, and interaction profile is essential for optimizing therapy and preventing downstream prescribing problems. Mechanism of ActionVilazodone is classified as a selective serotonin reuptake inhibitor (SSRI) and a partial agonist at the 5-HT1A receptor. The SSRI activity increases synaptic serotonin by blocking the serotonin transporter, while partial agonism at 5-HT1A receptors may contribute to antidepressant effects and potentially reduce certain SSRI-associated adverse effects (though clinical evidence for this benefit is mixed). Adverse Effects GI effects – diarrhea, nausea, and vomiting are frequent early in therapy. Taking the medication with food can help minimize these. Insomnia – often dose-related; morning dosing may help. Sexual dysfunction – may be slightly