Cymbalta vs. Remeron

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

Key Takeaways

  • Cymbalta (duloxetine) is an SNRI approved for depression, anxiety, and several chronic pain conditions, while Remeron (mirtazapine) is FDA-approved only for major depressive disorder.

  • Remeron causes more sedation and appetite increase than Cymbalta, while Cymbalta more often causes nausea and requires caution with liver or kidney disease.

  • Both carry a boxed warning for suicidal thoughts in children and young adults, but doctors choose between them based on symptoms like pain, anxiety, sleep problems, or appetite loss.

Cymbalta vs. Remeron Drug Summary

Cymbalta

Cymbalta (duloxetine) is a serotonin and norepinephrine reuptake inhibitor (SNRI) approved for major depressive disorder, generalized anxiety disorder, and chronic pain conditions like diabetic neuropathy and fibromyalgia. It comes as a delayed-release capsule taken once or twice daily, with the dose increased over the first two weeks of treatment.

Remeron

Remeron (mirtazapine) is a tetracyclic antidepressant approved for major depressive disorder in adults. It is taken as a tablet or dissolvable tablet, usually once daily at bedtime, with the dose raised gradually over several weeks based on response.

Cymbalta vs. Remeron Side Effects

Cymbalta

Most common
nausea (up to 30%)
somnolence (up to 21%)
headache (up to 18%)
dizziness (up to 17%)

Remeron

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

Cymbalta vs. Remeron Dosage

Cymbalta

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 30 mg once daily Week 1
Maximum dose 60 mg twice daily If needed
Dose changes 2 increases Every week

Remeron

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 15 mg once daily Week 1
Maximum dose 45 mg once daily If needed
Dose changes 2 increases Every week

Cymbalta vs. Remeron Indications

Cymbalta

Cymbalta is FDA-approved for major depressive disorder and generalized anxiety disorder, as well as chronic pain conditions including diabetic peripheral neuropathy, fibromyalgia, and chronic musculoskeletal pain such as osteoarthritis and low back pain. This makes it one of the few antidepressants also approved to treat ongoing physical pain.

  • Major depressive disorder

  • Generalized anxiety disorder

  • Diabetic peripheral neuropathic pain

  • Fibromyalgia

  • Chronic musculoskeletal pain (including osteoarthritis and low back pain)

Remeron

Remeron is FDA-approved only for major depressive disorder in adults. Doctors sometimes prescribe it off-label for insomnia, anxiety disorders, or to stimulate appetite in people who are underweight, though these uses are not FDA-approved.

  • Major depressive disorder (FDA-approved)

  • Insomnia (off-label)

  • Anxiety disorders (off-label)

  • Appetite or weight stimulation (off-label)

  • Nausea in pregnancy (off-label)

Cymbalta vs. Remeron Pros and Cons

Cymbalta

Cymbalta's SNRI mechanism gives it FDA approval for both psychiatric symptoms and chronic pain, making it a common choice for people with depression alongside conditions like fibromyalgia or nerve pain. It requires caution in people with liver disease or significant kidney impairment and tends to cost more than generic mirtazapine.

Pros

  • FDA-approved for chronic pain conditions like diabetic neuropathy and fibromyalgia, not just depression

  • Also approved to treat generalized anxiety disorder

  • Less likely to cause weight gain or heavy sedation than Remeron

  • Once- or twice-daily dosing without a strict bedtime requirement

Cons

  • Requires caution and monitoring in people with liver disease

  • Not recommended for people with severe kidney impairment

  • Nausea is common, especially during the first few weeks

  • Typically costs more than generic mirtazapine, roughly $130 to $500 per month before savings programs, versus $10 to $40 for generic Remeron

Remeron

Remeron's sedating profile makes it useful at bedtime and appealing for people who also struggle with insomnia or poor appetite, though it is approved only for depression itself. Generic mirtazapine is widely available and inexpensive, but it carries a higher likelihood of weight gain and sedation than Cymbalta.

Pros

  • Generic mirtazapine is inexpensive, typically $10 to $40 per month, compared to $130 to $500 for Cymbalta

  • Sedating effect can help with sleep, often used off-label for insomnia

  • Available as an orally disintegrating tablet for people with swallowing difficulty

  • Simple three-step dosing schedule with fewer maintenance adjustments

Cons

  • Only FDA-approved for depression; other uses are off-label

  • Significant sedation and appetite increase often lead to weight gain

  • Rare but serious risk of neutropenia requiring blood monitoring

  • Not indicated for anxiety or chronic pain conditions, unlike Cymbalta

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