Effexor vs. Remeron

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

Key Takeaways

  • Effexor is FDA-approved for depression plus generalized anxiety, social anxiety, and panic disorder, while Remeron is approved only for depression.

  • Effexor's most common side effect is nausea, while Remeron's is sedation, which is why it is usually taken at bedtime.

  • Both carry a boxed warning for suicidal thoughts in young people and cannot be combined with MAOIs due to serotonin syndrome risk.

Effexor vs. Remeron Drug Summary

Effexor

Effexor (venlafaxine) is a serotonin-norepinephrine reuptake inhibitor (SNRI) approved for major depressive disorder, generalized anxiety disorder, social anxiety disorder, and panic disorder. It comes as an extended-release capsule taken once daily, with the dose slowly increased over time.

Remeron

Remeron (mirtazapine) is a tetracyclic antidepressant approved for major depressive disorder in adults. It is taken once a day, usually at bedtime, as a regular tablet or a fast-dissolving tablet, with the dose raised every one to two weeks as needed.

Effexor vs. Remeron Side Effects

Effexor

Most common
somnolence (up to 23%)
dry mouth (up to 22%)
dizziness (up to 19%)
nausea (up to 37%)

Remeron

Most common
somnolence (up to 54%)
dry mouth (up to 25%)
dizziness (up to 7%)
increased appetite (up to 17%)

Effexor vs. Remeron Dosage

Effexor

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 37.5 mg once daily Days 1-7
Maximum dose 225 mg once daily If needed
Dose changes 3 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

Effexor vs. Remeron Indications

Effexor

Effexor is FDA-approved for major depressive disorder, generalized anxiety disorder, social anxiety disorder, and panic disorder with or without agoraphobia. Doctors also prescribe it off-label for chronic nerve pain and menopausal hot flashes.

  • Major depressive disorder

  • Generalized anxiety disorder

  • Social anxiety disorder

  • Panic disorder

Remeron

Remeron is FDA-approved only for major depressive disorder in adults. It is also prescribed off-label for insomnia, anxiety, and to stimulate appetite in patients who need to gain weight, such as those with cancer or eating disorders.

  • Major depressive disorder

  • Insomnia (off-label)

  • Anxiety disorders (off-label)

  • Appetite stimulation (off-label)

Effexor vs. Remeron Pros and Cons

Effexor

Effexor covers more ground than Remeron, with FDA approval for anxiety disorders as well as depression. Its extended-release form allows once-daily dosing, but higher doses can raise blood pressure and require monitoring.

Pros

  • FDA-approved for anxiety disorders, not just depression

  • Once-daily extended-release dosing

  • Dual serotonin-norepinephrine action may help nerve pain off-label

Cons

  • Nausea is very common, especially when starting

  • Can raise blood pressure at higher doses

  • Requires a slow taper to avoid discontinuation symptoms

Remeron

Remeron is approved only for depression, but its strong sedating effect makes it useful for patients dealing with insomnia alongside low mood. It also tends to increase appetite, which can be a benefit or a drawback depending on the patient.

Pros

  • Strong sedative effect helpful for co-occurring insomnia

  • Appetite stimulation can help underweight patients

  • Fewer sexual side effects than many other antidepressants

Cons

  • Only FDA-approved for depression, not anxiety disorders

  • Significant weight gain is common

  • Rare risk of severe neutropenia requires blood monitoring

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