Lexapro vs Zoloft
How escitalopram and sertraline compare on uses, side effects, and what to expect.
How they're similar
Escitalopram and sertraline are both selective serotonin reuptake inhibitors, usually shortened to SSRIs. They share a long list of features.
- They work the same way, by slowing the reuptake of serotonin so more of it stays available between nerve cells.
- They follow the same timeline. Early side effects can show in the first week or two, while the fuller effect on mood and anxiety usually takes four to six weeks.
- They share a core set of side effects: nausea and other stomach effects, sexual side effects, increased sweating, and changes in sleep.
- Both can cause discontinuation symptoms if stopped abruptly, so both need a gradual taper planned with a prescriber.
- Both carry the antidepressant boxed warning about a possible increase in suicidal thoughts in people under 25, especially early in treatment.
- Both have been available as inexpensive generics for years.
How they differ
The differences are real but narrow. Sertraline carries more FDA-approved uses, and escitalopram has one effect on heart rhythm that sertraline does not. The table below sums up the core points, with more detail underneath.
| Escitalopram (Lexapro) | Sertraline (Zoloft) | |
|---|---|---|
| Drug class | SSRI | SSRI |
| FDA-approved uses | Major depressive disorder, generalized anxiety disorder | Major depressive disorder, panic disorder, PTSD, social anxiety disorder, OCD, PMDD |
| Dosing range | Simple range, commonly 10 to 20 mg a day | Wider range, commonly 50 to 200 mg a day |
| Notable side effect tendency | Often regarded as slightly better tolerated, with fewer stomach effects for many people | More associated with diarrhea and loose stools |
| Heart rhythm (QT) | Dose-related QT effect, so a lower maximum dose for adults over 65 and people with significant liver problems | Low risk of QT effects |
| Drug interactions | Relatively clean, with few interactions | Relatively clean |
Sertraline is approved for more conditions. It is FDA-approved for major depressive disorder, panic disorder, post-traumatic stress disorder, social anxiety disorder, obsessive-compulsive disorder, and premenstrual dysphoric disorder. Escitalopram is approved for major depressive disorder and generalized anxiety disorder, and it is used off-label for the others, meaning for purposes the label does not formally list even though evidence and practice support them.
On side effects, sertraline is more associated with diarrhea and loose stools, while escitalopram is often regarded as slightly better tolerated overall, with fewer stomach effects for many people. The difference is a tendency, not a rule, and many people do well on either.
The clearest medical difference is heart rhythm. Escitalopram has a dose-related effect on the QT interval, a measure of heart rhythm. Because of that, its maximum dose is lower for adults over 65 and for people with significant liver problems. Sertraline has a low risk of QT effects. That can matter for people with certain heart conditions, or for people who take other medicines that affect heart rhythm.
Both medications are relatively clean on drug interactions, and escitalopram in particular has few. Their dosing differs in shape rather than difficulty: escitalopram has a simple range, commonly 10 to 20 mg a day, while sertraline has a wider range, commonly 50 to 200 mg a day.
Side effects compared
The everyday side effects of these two medications overlap closely. Both can cause nausea and other stomach effects, sexual side effects, increased sweating, and changes in sleep. With both, side effects tend to arrive before the benefit, and the stomach-related ones often ease within the first couple of weeks.
The main difference in this area is the one noted above. Sertraline causes loose stools and diarrhea somewhat more often, while escitalopram tends to be a little gentler on the stomach for many people. If a side effect is severe, or it is not improving after a few weeks, that is a conversation to have with a prescriber rather than a reason to stop on your own.
Sleep, weight, and sexual effects
For sleep, weight, and sexual effects, the two are broadly similar.
Both are roughly weight-neutral in the short term. Both can disturb sleep, and less often, both can make some people sleepier. Sexual side effects are common with both. They can include lower sex drive, delayed orgasm, and arousal difficulties, and they tend to last as long as the medication is taken rather than fading like nausea does. These effects are worth raising with a prescriber, because there are real options, including a dose change or a switch.
Why a clinician might choose one over the other
Because the two are closely matched, the choice often comes down to specifics.
A clinician might choose sertraline when the target is panic disorder, PTSD, OCD, or PMDD, since sertraline is formally approved for those conditions. Sertraline is also a reasonable choice when avoiding any QT effect matters, for example in someone with a heart condition or on other medicines that affect heart rhythm.
A clinician might choose escitalopram for its simple dosing and very low interaction profile, or for generalized anxiety disorder. Beyond the medication itself, prior response, a family history of response, other medications, and other health conditions all factor into the decision.
The bottom line
Neither escitalopram nor sertraline is clearly better. They are closely matched SSRIs, and the right choice depends on the individual and is made with a prescriber. It is also common to try one and switch to the other if the fit is not right. A first medication that does not suit someone is a normal step in treatment, not a failure.
Sources
This guide draws on current prescribing information and public health references. It is reviewed for clinical accuracy and updated as guidance changes.
- U.S. Food and Drug Administration. Escitalopram prescribing information.
- U.S. Food and Drug Administration. Sertraline prescribing information.
- MedlinePlus, U.S. National Library of Medicine.
- National Institute of Mental Health. Mental health medications.
Managing a medication needs a prescriber
Any psychiatric medication has to be started and adjusted by a clinician who can follow you over time. If you don't have a prescriber, our guides section explains the options, including in-person care and telepsychiatry, and how to choose between them.
This guide is for general education. It is not medical advice and is not a substitute for evaluation, diagnosis, or treatment by a qualified clinician. Never start, stop, or change a medication without talking to your prescriber. If you are in crisis or thinking about harming yourself, call or text 988 in the U.S. to reach the Suicide and Crisis Lifeline.