Zoloft (sertraline): uses, side effects, and what to expect

If you or your psychiatrist are considering Zoloft, you probably have questions about what it does, how it works, and what to expect. Zoloft (sertraline) is a selective serotonin reuptake inhibitor (SSRI) commonly prescribed for depression, anxiety, and several other mood-related conditions. It is one of the most widely prescribed antidepressants in the United States.

Key takeaways

• Zoloft (sertraline) is an SSRI prescribed for depression, anxiety, OCD, PTSD, panic disorder, and other conditions.¹
• It works by slowing the reabsorption of serotonin, a brain chemical involved in mood and anxiety.¹
• Most people begin to notice improvements within two to six weeks of starting treatment.²
• Side effects like nausea, changes in appetite, and sleep disruption are common early on and often improve with time.²

What is Zoloft?

Zoloft is the brand name for sertraline, a medication in the selective serotonin reuptake inhibitor (SSRI) class. It is approved by the U.S. Food and Drug Administration to treat several conditions related to mood and anxiety.¹ Sertraline is available as a generic medication, which means it may also be prescribed under its generic name.

What does Zoloft treat?

Zoloft is FDA-approved to treat a range of mood and anxiety-related conditions.¹ Your psychiatrist will determine whether it is a good fit based on your symptoms, history, and treatment goals.

On-label uses

• Major depressive disorder (depression)
• Panic disorder
• Social anxiety disorder
• Obsessive-compulsive disorder (OCD)
• Post-traumatic stress disorder (PTSD)
• Premenstrual dysphoric disorder (PMDD)

Off-label uses

Psychiatrists sometimes prescribe sertraline off-label (meaning for conditions beyond its FDA-approved uses) to help treat generalized anxiety disorder (GAD).

How does Zoloft work?

Serotonin is a chemical messenger that helps brain cells communicate about mood, sleep, and anxiety. Normally, after serotonin sends a signal, it gets pulled back into the nerve cell that released it. Sertraline slows that process down, so more serotonin stays available to keep sending signals between brain cells.¹

• Helps your brain keep more serotonin available. Sertraline slows the reabsorption of serotonin, a brain chemical that plays an important role in mood and anxiety.¹
• Supports clearer communication between brain cells. With more serotonin circulating, the brain's mood and anxiety pathways can send signals more effectively.¹
• Gradually reduces anxiety and improves mood stability. Over time, these changes can help ease persistent worry, emotional lows, and the physical symptoms of anxiety.

3 things a Talkiatry psychiatrist wants you to know about Zoloft

• It is often a first-choice SSRI. Sertraline is commonly prescribed because it tends to be well tolerated and works for a wide range of conditions.
• It takes time to work, and that is normal. If you don't feel different in the first week or two, that doesn't mean the medication isn't working. Your psychiatrist will check in on your progress and make adjustments before concluding it isn't the right fit.
• Consistency matters. Taking sertraline every day as prescribed helps maintain steady serotonin levels and gives the medication the best chance to work.

Common side effects of Zoloft

Like most medications, sertraline can cause side effects. Many of these are mild and may improve as your body adjusts.²

• Nausea and diarrhea
• Heartburn
• Decreased appetite
• Involuntary shaking or tremor in part of the body
• Sexual side effects, including reduced sex drive, difficulty with erection, or delayed orgasm
• Excessive sweating

Talk to your psychiatrist if any of these feel persistent, severe, or get in the way of your day.

Serious side effects of Zoloft and when to seek help

Serious side effects are less common but require prompt medical attention.²

• Sertraline and similar medications may raise the risk of suicidal thoughts and behaviors, particularly in children, teenagers, and young adults under 24, especially in the first months of treatment or after a dose change
• New or worsening depression, thoughts of self-harm, extreme worry, panic attacks, agitation, severe restlessness, aggressive behavior, or abnormally excited mood
• Seizures
• Unusual bleeding or bruising
• Signs of serotonin syndrome: agitation, hallucinations, fever, sweating, confusion, rapid heartbeat, shivering, severe muscle stiffness or twitching, loss of coordination, nausea, vomiting, or diarrhea
• Headache, weakness, unsteadiness, confusion, or memory difficulties, which may be signs of low sodium
• Rash, hives, swelling, or trouble breathing, which may be signs of an allergic reaction
• Nausea, eye pain, vision changes such as colored rings around lights, or swelling or redness in or around the eye, which may be signs of angle-closure glaucoma in people at risk for the condition

Call your psychiatrist right away or seek emergency care if you experience any of these symptoms.

What to watch for when starting Zoloft

Starting a new medication can feel like a lot to keep in mind. Here are some things your psychiatrist may discuss with you.²

• Full benefits may take several weeks or longer to develop.
• Your psychiatrist may start you on a lower dose and increase it gradually.
• Sertraline may cause drowsiness. Avoid driving or operating machinery until you know how it affects you.
• Talk to your psychiatrist about safe alcohol use while taking sertraline, as alcohol may worsen side effects.
• Do not stop sertraline suddenly without medical guidance. Stopping abruptly may cause discontinuation symptoms such as nausea, sweating, mood changes, dizziness, headache, confusion, irritability, anxiety, numbness or tingling, difficulty sleeping, tiredness, or ringing in the ears.²
• If you are at risk for glaucoma or other vision conditions, discuss having an eye exam before starting sertraline, due to the small risk of angle-closure glaucoma.

What to do if you miss a dose of Zoloft

Take the missed dose as soon as you remember. If it is almost time for your next scheduled dose, skip the missed dose and continue your regular schedule. Do not take a double dose to make up for a missed one.²

Who should talk to a psychiatrist before taking Zoloft

Some health conditions, medications, and life situations change how Zoloft is prescribed. Tell your psychiatrist if any of the following apply to you.²

• A known allergy to sertraline or any of its inactive ingredients
• Current or recent use (within two weeks) of a monoamine oxidase inhibitor (MAOI)
• A history of seizures
• Liver, kidney, or heart disease, or a recent heart attack or stroke
• High blood pressure or bleeding disorders
• Pregnancy (especially in the last trimester), plans to become pregnant, or breastfeeding
• Use of St. John's wort, tryptophan, aspirin, or NSAIDs such as ibuprofen or naproxen