Zoloft vs Lexapro: sertraline and escitalopram compared
Zoloft (sertraline) and Lexapro (escitalopram) are two of the most prescribed antidepressants in the United States. Both are SSRIs, both are inexpensive generics, and both work about equally well for depression; they differ in approved uses, dose range, side effects and a few situations where one is usually preferred.
Updated October 3, 2026
At a glance
- Approved uses
- Zoloft
- Depression, OCD, panic disorder, PTSD, social anxiety disorder, PMDD
- Lexapro
- Depression and generalized anxiety disorder
- Usual dose range
- Zoloft
- Wide, with several steps between the starting dose and the maximum
- Lexapro
- Narrow, usually one or two steps
- Side effects more often noted
- Zoloft
- Diarrhea and other stomach upset
- Lexapro
- Dose-related effect on heart rhythm (QT), relevant for some people
- Generic available
- Zoloft
- Yes
- Lexapro
- Yes
Zoloft sertraline | Lexapro escitalopram | |
|---|---|---|
| Approved uses | Depression, OCD, panic disorder, PTSD, social anxiety disorder, PMDD | Depression and generalized anxiety disorder |
| Usual dose range | Wide, with several steps between the starting dose and the maximum | Narrow, usually one or two steps |
| Side effects more often noted | Diarrhea and other stomach upset | Dose-related effect on heart rhythm (QT), relevant for some people |
| Generic available | Yes | Yes |
Do they work differently?
Large analyses comparing antidepressants place both among the better-tolerated options, with small differences in effect. In practice, the choice often comes down to the condition being treated, since sertraline carries more approved uses, other medicines, past response, and side effects. Either takes several weeks to reach its full effect, and both carry the boxed warning about suicidal thoughts in people under 25.
Situations that favor one
Sertraline is often chosen during breastfeeding, because very little reaches the baby, and for OCD and PTSD, where it is approved. Escitalopram’s simple dosing and tolerability make it a common first choice for anxiety; because of its effect on heart rhythm at higher doses, it may be avoided in people with certain heart conditions or on other QT-prolonging drugs. Both can cause sexual side effects, and neither should be stopped abruptly.
Cost
Both are commodity generics, so cash prices are mostly dispensing fees, and ninety-day fills cost far less per day. Sertraline’s oral concentrate costs pharmacies more than the tablets; escitalopram’s liquid does too.
Switching and interactions
Switching from one to the other is common and is done under a prescriber’s direction, usually by lowering one while starting the other. Both interact with other serotonin-affecting medicines, such as tramadol, some migraine drugs and St John’s wort, which raises the risk of serotonin syndrome, and with blood thinners and anti-inflammatories, which raises bleeding risk.
Questions for your prescriber
- Which is approved for the condition I am being treated for?
- How long before we judge whether it is working?
- What should I do about side effects in the first weeks?
- How would we stop or switch it safely if needed?
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Sources
- DailyMed, FDA-approved prescribing information
- MedlinePlus drug information (National Library of Medicine)
- FDA Orange Book (approved generics and therapeutic equivalence)
Written by the Script Unlock editorial team from the sources above. It is general information, not advice for you or your pet; your prescriber decides which medicine is right.
Script Unlock is a marketplace that lets licensed pharmacies quote a cash price on your prescription. It does not prescribe, dispense or sell medication, does not process patient payments, and does not give medical advice. Always follow the instructions of your prescriber and pharmacist and read the medication guide supplied with your medicine.