Zoloft vs. Celexa

See how Zoloft and Celexa compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Zoloft is FDA-approved for six conditions including panic disorder, PTSD, and social anxiety, while Celexa is approved only for major depressive disorder in adults.

  • Celexa has a simpler two-step dosing schedule, but doses above 40 mg per day are avoided because of a risk of heart rhythm changes called QT prolongation.

  • Both drugs commonly cause nausea, dry mouth, and insomnia early in treatment, though Zoloft is more likely to cause diarrhea and sexual side effects.

Zoloft vs. Celexa Drug Summary

Zoloft

Zoloft (sertraline) is a selective serotonin reuptake inhibitor approved for major depressive disorder, OCD, panic disorder, PTSD, social anxiety disorder, and PMDD. It comes as a tablet or oral solution taken once daily, usually starting at 25 mg or 50 mg and adjusted based on response.

Celexa

Celexa (citalopram) is a selective serotonin reuptake inhibitor approved for major depressive disorder in adults. It comes as a tablet or oral solution taken once daily, starting at 20 mg for the first week before moving to a standard maintenance dose of 40 mg.

Zoloft vs. Celexa Side Effects

Zoloft

Most common
nausea (up to 26%)
insomnia (up to 20%)
dry mouth (up to 14%)
diarrhea (up to 20%)

Celexa

Most common
nausea (up to 21%)
insomnia (up to 15%)
dry mouth (up to 20%)
somnolence (up to 18%)

Zoloft vs. Celexa Dosage

Zoloft

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 50 mg once daily Week 1
Maximum dose 200 mg once daily If needed
Dose changes 3 increases As tolerated

Celexa

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily Week 1
Maximum dose 40 mg once daily Week 2 onward
Dose changes 1 increase Every week

Zoloft vs. Celexa Indications

Zoloft

Zoloft holds FDA approval for more conditions than most SSRIs, covering both depression and several anxiety-related disorders. It is also one of the few SSRIs approved for OCD in children as young as 6.

  • Major depressive disorder (MDD) in adults

  • OCD in adults and children ages 6-17

  • Panic disorder, with or without agoraphobia

  • Posttraumatic stress disorder (PTSD)

  • Social anxiety disorder and PMDD

Celexa

Celexa's FDA approval is limited to major depressive disorder in adults. It is frequently prescribed off-label for anxiety-related conditions, though those uses have not been evaluated or approved by the FDA.

  • Major depressive disorder (MDD) in adults

  • Off-label for generalized anxiety disorder

  • Off-label for panic disorder

  • Off-label for obsessive-compulsive disorder

  • Not approved for use in children or teens

Zoloft vs. Celexa Pros and Cons

Zoloft

Zoloft carries FDA approval for the widest range of anxiety and mood disorders among SSRIs, making it a flexible choice when depression overlaps with panic attacks, PTSD, or social anxiety. Dosing is adjusted gradually over several weeks up to a maximum of 200 mg per day.

Pros

  • Approved for six conditions, not just depression

  • No QT-prolongation dose cap like citalopram

  • Approved for pediatric OCD, ages 6 and up

  • Flexible dosing range up to 200 mg per day

Cons

  • Higher rates of nausea and diarrhea reported

  • Sexual side effects, especially in men, are common

  • More titration steps than Celexa's simpler schedule

  • Not approved for pediatric depression

Celexa

Celexa is approved specifically for major depressive disorder, and its two-step dosing schedule is simpler than many other SSRIs. Because of a dose-dependent risk of heart rhythm changes, doses above 40 mg per day are not recommended, which limits flexibility for some patients.

Pros

  • Simple two-step dosing: 20 mg, then 40 mg

  • Long track record of use since 1998

  • Lower reported rate of diarrhea than Zoloft

  • Straightforward once-daily regimen

Cons

  • Only FDA-approved for one condition, MDD

  • 40 mg/day dose ceiling limits upward titration

  • Lower max dose (20 mg) for older adults or poor metabolizers

  • Not approved for pediatric use or bipolar depression

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