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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 Action
Vilazodone 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
Drug Interactions
Vilazodone is primarily metabolized by CYP3A4. This means:
Prescribing Cascade Examples
Vilazodone’s adverse effects can easily lead to unnecessary prescriptions if side effects aren’t recognized:
Vilazodone’s combination of SSRI and 5-HT1A partial agonist activity makes it somewhat distinct, but its side effect profile and interactions require the same careful monitoring as other antidepressants. Healthcare professionals can play a key role in catching early signs of adverse effects, preventing prescribing cascades, and ensuring drug–drug interactions are managed appropriately.
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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 Action
Vilazodone 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
Drug Interactions
Vilazodone is primarily metabolized by CYP3A4. This means:
Prescribing Cascade Examples
Vilazodone’s adverse effects can easily lead to unnecessary prescriptions if side effects aren’t recognized:
Vilazodone’s combination of SSRI and 5-HT1A partial agonist activity makes it somewhat distinct, but its side effect profile and interactions require the same careful monitoring as other antidepressants. Healthcare professionals can play a key role in catching early signs of adverse effects, preventing prescribing cascades, and ensuring drug–drug interactions are managed appropriately.
Be sure to check out our free Top 200 study guide – a 31 page PDF that is yours for FREE!
NAPLEX Study Materials
BCPS Study Materials
BCACP Study Materials
BCGP Study Materials
BCMTMS Study Materials
Meded101 Guide to Nursing Pharmacology (Amazon Highly Rated)
Guide to Drug Food Interactions (Amazon Best Seller)
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