Viibryd vs. Remeron

See how Viibryd and Remeron compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Viibryd is a serotonin partial agonist and reuptake inhibitor taken with food, while Remeron is a sedating tetracyclic antidepressant usually taken at bedtime.

  • Viibryd's most common side effects are gastrointestinal, while Remeron more often causes drowsiness, increased appetite, and weight gain.

  • Both drugs carry a boxed warning for increased suicidal thoughts in children, adolescents, and young adults and are not approved for pediatric depression.

Viibryd vs. Remeron Drug Summary

Viibryd

Viibryd (vilazodone) is a serotonin partial agonist and reuptake inhibitor (SPARI) approved for major depressive disorder in adults. It is taken once daily with food, since food significantly boosts absorption. Its mechanism combines serotonin reuptake blockade with partial 5-HT1A receptor activation, setting it apart from standard SSRIs.

Remeron

Remeron (mirtazapine) is a tetracyclic antidepressant approved for major depressive disorder in adults. It is typically taken once daily at bedtime because of its strong sedating effect, especially at lower doses. Beyond depression, it is also used off-label for insomnia, anxiety, and appetite stimulation.

Viibryd vs. Remeron Side Effects

Viibryd

Most common
diarrhea (up to 28%)
nausea (up to 23%)
insomnia (6% to 7%)
vomiting (up to 5%)

Remeron

Most common
somnolence (up to 54%)
dry mouth (up to 25%)
increased appetite (up to 17%)
constipation (up to 13%)

Viibryd vs. Remeron Dosage

Viibryd

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg once daily Days 1-7
Maximum dose 40 mg once daily Day 15 onward
Dose changes 2 increases Every 7 days

Remeron

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 15 mg once daily At the start
Maximum dose 45 mg once daily If needed
Dose changes 2 increases As tolerated

Viibryd vs. Remeron Indications

Viibryd

Viibryd is FDA-approved specifically for major depressive disorder in adults. It has not been established as safe or effective in children or adolescents. Doctors sometimes consider it when a patient hasn't responded well to standard SSRIs, given its added 5-HT1A partial agonism.

  • Treats major depressive disorder in adults

  • Not approved for pediatric depression

  • Sometimes considered after SSRI non-response

  • Requires food for proper absorption

Remeron

Remeron is FDA-approved for major depressive disorder in adults and is not established as safe or effective in children. Its sedating and appetite-stimulating properties make it a common off-label choice for insomnia, anxiety, and low appetite. It is generally avoided in bipolar depression due to safety concerns.

  • Treats major depressive disorder in adults

  • Not approved for pediatric depression

  • Off-label use for insomnia and anxiety

  • Off-label use for appetite/weight stimulation

Viibryd vs. Remeron Pros and Cons

Viibryd

Viibryd offers a distinct mechanism that may cause less weight gain than many SSRIs, though it is not sedating and requires a specific dosing routine with food. As a brand-name drug without a widely available generic, it tends to cost more out of pocket than mirtazapine.

Pros

  • Less commonly linked to weight gain

  • Non-sedating, can be taken in the morning

  • Distinct 5-HT1A mechanism may help SSRI non-responders

Cons

  • Must be taken with food to absorb properly

  • No widely available generic, higher cost

  • GI side effects like diarrhea and nausea are common

  • Costs roughly $380 to $650 per month without insurance

Remeron

Remeron's sedating effect and appetite stimulation make it useful for patients with insomnia or poor appetite alongside depression, but the same effects often cause weight gain and daytime drowsiness. It also carries a rare risk of severe neutropenia that requires watching for symptoms like fever or sore throat.

Pros

  • Generic version costs roughly $10 to $40 per month, much less than Viibryd

  • Sedating effect can help with co-occurring insomnia

  • May stimulate appetite in patients with poor intake

Cons

  • Causes significant weight gain and appetite increase

  • Strong sedation can impair daytime alertness

  • Rare risk of severe neutropenia requiring blood monitoring

  • Not used for bipolar depression

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