Sertraline (Zoloft)Uses, Side Effects & What to Expect

Sertraline is one of the most commonly prescribed antidepressants, and for good reason: it treats a wide range of conditions and is generally well tolerated. If your psychiatrist has suggested sertraline, you probably have questions about what to expect, how long it takes to work, and side effects like weight gain. This guide covers what sertraline treats, common Zoloft side effects, the typical timeline, and special considerations such as breastfeeding and stopping safely.

What Is Sertraline Used For?

Sertraline is used for major depression, panic disorder, social anxiety disorder, obsessive-compulsive disorder, PTSD, and PMDD, and it’s sometimes used for other anxiety conditions. It’s a selective serotonin reuptake inhibitor, or SSRI, which increases the availability of serotonin in the brain.

A large network meta-analysis of 21 antidepressants found that all studied antidepressants, including sertraline, were more effective than placebo for adults with major depression. Our guide to SSRIs vs SNRIs explains how sertraline fits among the options.

Common Zoloft Side Effects

Common Zoloft side effects include nausea, diarrhea or upset stomach, headache, sleep changes, sweating, dizziness, and sexual side effects, and many of the early ones fade within a few weeks. Taking it with food can help stomach symptoms, and adjusting the timing of the dose can help with sleep.

• Stomach upset: often early and often temporary.
• Sleep changes: trouble sleeping or feeling drowsy.
• Sexual side effects: lower desire or delayed orgasm, which can often be managed.
• Restlessness: some people feel jittery at first.

Our guide to antidepressant side effects explains what can be adjusted if side effects don’t settle.

Some people feel slightly more anxious or restless in the first week or two on an SSRI. Starting at a lower dose, and increasing gradually, often prevents this. If it happens, tell your psychiatrist rather than stopping on your own.

Sertraline works for many people, but it works best with patience in the first weeks and a psychiatrist who adjusts the plan with you.

How Long Does Sertraline Take to Work?

Sertraline usually takes about 2 to 4 weeks to start helping and 4 to 8 weeks for fuller benefit, although some people notice improvements in sleep or energy earlier. The dose is often started low and increased gradually. If symptoms haven’t improved enough after an adequate trial, your psychiatrist may adjust the dose or consider another approach.

Our timeline of how long antidepressants take to work explains what to expect week by week.

1. Start low. Begin at a low dose to limit early side effects.
2. Take it consistently. Take it at the same time each day, with food if it upsets your stomach.
3. Give it time. Expect gradual benefit over 4 to 8 weeks.
4. Track symptoms. Note mood, sleep, anxiety, and side effects.
5. Follow up. Review progress and adjust the dose with your psychiatrist.

Sertraline can interact with other medications, including blood thinners, some pain relievers, and other serotonin-affecting drugs. Share your full medication list, including supplements such as St. John’s wort, so your psychiatrist and pharmacist can check for interactions.

Sertraline and Weight Gain

Sertraline and weight gain is a common concern. In a large 2024 study of more than 183,000 adults, sertraline served as the comparison drug, and as summarized by Harvard Health Publishing, average weight gain at two years was about 3.2 pounds with sertraline, compared with about 3.6 pounds with escitalopram and about 1.2 pounds with bupropion.

Weight change varies widely between individuals. Tracking weight from the start and discussing changes early helps. Our guides to antidepressants and weight gain and bupropion explore alternatives.

If weight is a major concern from the start, it’s reasonable to raise it before choosing a medication. There are options with different weight profiles, and the choice can balance weight with how well each option is likely to treat your symptoms.

Sertraline While Breastfeeding

Sertraline while breastfeeding is often considered a preferred option, because very little reaches the infant. According to LactMed, an exclusively breastfed infant receives about 0.5% of the mother’s weight-adjusted dose, sertraline is usually not detected in infant blood, and most authoritative reviewers consider it a preferred antidepressant during breastfeeding. In one review, 87.4% of infant blood levels were below the limit of detection.

Decisions should still be individualized, especially for preterm or very young infants. Our guide to psychiatric medication while breastfeeding explains the full picture.

Stopping Sertraline Safely

Stopping sertraline safely means tapering gradually with your psychiatrist rather than stopping suddenly, which can cause discontinuation symptoms such as dizziness, irritability, flu-like feelings, or sleep problems. The pace depends on your dose, how long you’ve taken it, and how you respond.

Our guide to tapering psychiatric medication safely explains the process. A comprehensive medication review can help decide whether sertraline is right for you or whether a change makes sense. If you’re having thoughts of suicide, call or text 988 in the US.