Paxil vs. Escitalopram

See how Paxil and Escitalopram compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Paxil and escitalopram are both SSRIs, but Paxil is FDA-approved for OCD, panic disorder, social anxiety disorder, and PTSD, while escitalopram's approval is limited to depression and generalized anxiety disorder.

  • Paxil's short half-life makes withdrawal symptoms more likely if a dose is missed or stopped, while escitalopram tends to cause milder discontinuation effects.

  • Escitalopram typically costs far less than Paxil because generic versions have been widely available for years.

Paxil vs. Escitalopram Drug Summary

Paxil

Paxil (paroxetine) is a selective serotonin reuptake inhibitor used for depression, OCD, panic disorder, social anxiety disorder, generalized anxiety disorder, and PTSD. It comes as an immediate-release tablet taken once daily, with extended-release and liquid options also available.

Escitalopram

Escitalopram is a selective serotonin reuptake inhibitor approved for major depressive disorder in adults and adolescents and for generalized anxiety disorder in adults. It is taken once daily as a tablet or oral solution, usually starting at 10 mg before increasing to 20 mg.

Paxil vs. Escitalopram Side Effects

Paxil

Most common
nausea (up to 26%)
somnolence (up to 23%)
insomnia (up to 13%)
dry mouth (up to 18%)

Escitalopram

Most common
nausea (up to 15%)
somnolence (up to 7%)
insomnia (up to 9%)
ejaculation disorder (up to 9%)

Paxil vs. Escitalopram Dosage

Paxil

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily At the start
Maximum dose 50 mg once daily If needed
Dose changes 3 increases As tolerated

Escitalopram

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg once daily Week 1
Maximum dose 20 mg once daily Week 2 onward
Dose changes 1 increase Every week

Paxil vs. Escitalopram Indications

Paxil

Paxil is FDA-approved for a wide range of conditions, including major depressive disorder, OCD, panic disorder, social anxiety disorder, and PTSD. It works by increasing serotonin availability in the brain across all of these conditions.

  • Major depressive disorder

  • Obsessive-compulsive disorder

  • Panic disorder

Escitalopram

Escitalopram is FDA-approved for major depressive disorder in both adults and adolescents ages 12 to 17, as well as for generalized anxiety disorder in adults. Its approval list is narrower than Paxil's, focusing on these two core conditions.

  • Major depressive disorder in adults

  • Major depressive disorder in adolescents 12-17

  • Generalized anxiety disorder in adults

Paxil vs. Escitalopram Pros and Cons

Paxil

Paxil covers more FDA-approved indications than escitalopram, making it useful for patients with OCD, panic disorder, social anxiety, or PTSD alongside depression. It requires more careful management due to strong drug interactions and a higher chance of withdrawal symptoms when doses are missed.

Pros

  • FDA-approved for OCD, panic disorder, social anxiety, and PTSD

  • Available in extended-release and liquid forms

  • Long track record of use since 1992

Cons

  • Significant CYP2D6 interactions requiring dose adjustments

  • Higher rates of nausea, somnolence, and dry mouth

  • Short half-life increases risk of withdrawal symptoms

Escitalopram

Escitalopram is approved for fewer conditions than Paxil but is generally easier to dose, with a single titration step and lower cost due to widespread generic availability. It carries fewer drug interaction concerns, though it still requires caution with other serotonergic medications.

Pros

  • Simple once-daily dosing with only one titration step

  • Approved for adolescents 12 to 17 with depression

  • Fewer significant drug interactions than Paxil

Cons

  • Narrower FDA-approved use, limited to depression and anxiety

  • Sexual side effects such as ejaculation disorder are common

  • Not approved for OCD, panic disorder, or PTSD

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