Pristiq vs. Remeron

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

Key Takeaways

  • Pristiq is an SNRI taken once daily at a single 50 mg dose, while Remeron is a sedating tetracyclic antidepressant that requires titration up to 45 mg.

  • Remeron causes more sedation and appetite increase, making it a common off-label choice for insomnia or poor appetite, while Pristiq tends to cause more nausea and less drowsiness.

  • Both drugs carry a boxed warning for suicidal thinking in children and young adults and should not be combined with MAOIs.

Pristiq vs. Remeron Drug Summary

Pristiq

Pristiq (desvenlafaxine) is a serotonin-norepinephrine reuptake inhibitor (SNRI) approved for major depressive disorder in adults. It is an extended-release tablet taken once daily, usually starting and staying at 50 mg since higher doses show no added benefit.

Remeron

Remeron (mirtazapine) is a tetracyclic antidepressant approved for major depressive disorder in adults. It is taken once daily, usually at bedtime, starting at 15 mg and increasing over time up to a maintenance dose of 45 mg.

Pristiq vs. Remeron Side Effects

Pristiq

Most common
dry mouth (up to 25%)
constipation (up to 14%)
nausea (up to 41%)
dizziness (up to 16%)

Remeron

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

Pristiq vs. Remeron Dosage

Pristiq

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 50 mg once daily Day 1 onward
Maximum dose 50 mg once daily Same as starting
Dose changes None Fixed dose

Remeron

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 15 mg once daily Weeks 1-2
Maximum dose 45 mg once daily Week 5 onward
Dose changes 2 increases Every 2 weeks

Pristiq vs. Remeron Indications

Pristiq

Pristiq is FDA-approved only for treating major depressive disorder in adults. It has not been studied for use in children or for patients with severe kidney disease without dose adjustments.

  • Major depressive disorder (MDD) in adults

  • Only one FDA-approved indication

  • Not approved for pediatric depression

  • Dose adjustment needed in severe renal impairment

Remeron

Remeron is FDA-approved for major depressive disorder in adults. Clinicians also prescribe it off-label for insomnia, anxiety, appetite stimulation, and nausea, particularly in older adults or those with cancer.

  • Major depressive disorder (MDD) in adults

  • Off-label: insomnia

  • Off-label: anxiety disorders

  • Off-label: appetite or weight stimulation

Pristiq vs. Remeron Pros and Cons

Pristiq

Pristiq offers simple, consistent dosing without a titration schedule, and its lower sedation profile makes it easier to take during the day. Coverage varies by plan, and its list price is notably higher than generic mirtazapine.

Pros

  • No titration needed, one 50 mg dose from day one

  • Less sedating than Remeron, better suited for daytime use

  • Not linked to the weight gain seen with Remeron

  • Simpler dosing schedule with fewer changes to manage

Cons

  • Nausea affects up to 41% of patients

  • Hyperhidrosis (excess sweating) is a distinct side effect

  • Roughly $400 to $543 per month without insurance, more than generic mirtazapine

Remeron

Remeron's sedating effect can help with sleep and appetite in depression, though that same sedation can be a drawback for daytime function. Generic mirtazapine is widely available and much less expensive than brand-name Pristiq.

Pros

  • Sedating effect can help with sleep in depression with insomnia

  • Often used off-label to stimulate appetite and weight gain

  • Available as an orally disintegrating tablet for easier swallowing

  • Generic mirtazapine costs roughly $10 to $40 per month, much less than Pristiq

Cons

  • Somnolence affects up to 54% of patients

  • Weight gain and increased appetite are common side effects

  • Requires titration over several weeks to reach effective dose

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