Sertraline side effects: what’s normal and what to watch for

You don’t need to suffer alone. If you’re having thoughts of suicide or self-harm, get help now. Call or text 988 (the Suicide and Crisis Lifeline), or chat at 988lifeline.org. In an emergency, call 911.

Beginning sertraline (Zoloft®) can bring up a strange kind of worry: relief that you’re finally doing something for how you feel, mixed with unease about what your body might do in response. That unease is normal, and it doesn’t mean something is wrong. Most people get through the first few weeks without too much discomfort as the body adjusts to treatment, and knowing what to expect makes that stretch a lot less unsettling.

What are the most common sertraline side effects?

The most common sertraline (Zoloft) side effects are usually mild. Most people notice at least one within the first days or weeks, while the body settles into the new medication. That’s normal, and for most people it doesn’t last. They include:

• Nausea. Often, the first thing people notice. Taking sertraline (Zoloft) with food usually helps.
• Diarrhea or looser stools. Typically mild and settles as your body adjusts.
• Dry mouth. Water or sugar-free gum can help.
• Sleep changes. Some people have trouble sleeping; others feel more tired than usual. Taking your dose in the morning can help if it disrupts sleep at night.
• Tremor or shakiness. Usually slight and fades with time.
• Indigestion. Mild stomach discomfort that tends to ease within a few weeks.
• Reduced appetite. Common early on and usually temporary.
• Increased sweating. Can happen even without physical exertion.
• Dizziness. Often mild, especially when standing up quickly.
• Headache. One of the most frequently reported effects, usually short-lived.

Experiencing these side effects doesn’t mean the medication is wrong for you. It means your body is adjusting. Before changing your dose or timing on your own, check with your doctor first, since some adjustments (like a lower starting dose) work better under medical supervision.

 If you have questions about how much you’re taking, our guide to sertraline dosage and cost covers common dosing information and what the medication may cost.

Do sertraline side effects go away?

For most people, yes. It can take around two to eight weeks depending on various factors. Most early side effects fade by four to six weeks, often sooner, and that head start is worth having before deciding sertraline (Zoloft) isn’t the right fit.

Sexual side effects can be different. They may be less likely to improve on their own, so it’s worth bringing them up with your doctor rather than waiting them out or stopping the medication on your own.

There’s another part of the timeline worth knowing: mood benefits from sertraline (Zoloft) usually take four to eight weeks to fully show up, which means the side effects can arrive before the relief does. That timing can feel discouraging, but it’s expected.

Give it some time, and stay in touch with your doctor about how things are going.

Sertraline and sexual side effects

This is one of the most common things people want to know about and one of the least talked about. Plenty of people wonder about it, but few bring it up first.

Sexual side effects from sertraline (Zoloft) can include a lower sex drive and difficulty with erections. Some people notice delayed or absent orgasm, too, which can affect anyone, regardless of gender.

Unlike some early side effects, sexual side effects may not improve with time. Rather than waiting for them to go away or changing your dose on your own, bring them up with your doctor.

There are real options here, and your doctor can walk through each one of them with you: adjusting your dose, changing the time of day you take it, switching to a medication less likely to cause this effect (bupropion or Wellbutrin is one example), or adding a medication to offset it. These decisions work best when made together with your doctor, not on your own.

Sertraline and weight changes

Weight changes on sertraline (Zoloft) are usually small. If you notice slight weight gain, it’s a little more common with longer-term use, generally past the six-month mark. Some people, especially children, lose a small amount of weight early in treatment. 

If a change in weight is bothering you, tell your doctor. It’s a normal thing to raise, and there may be ways to manage it together. Read more about sertraline and weight gain to learn what to expect.

Serious sertraline side effects list

Most people on sertraline (Zoloft) never experience any of the items on this list. Still, knowing the signs is worth your time, not because they’re likely, but because catching them early makes a real difference.

Serious effect	Signs to notice	What to do
Serotonin syndrome	Agitation, fast heartbeat, high temperature, shivering, muscle twitching, confusion. More likely when combined with other medications that raise serotonin.	Seek emergency care
Unusual bleeding or bruising	Higher risk with NSAIDs or blood thinners. Watch for blood in urine, stool, or vomit.	Seek emergency care if you notice blood; otherwise, contact your doctor
Low sodium (hyponatremia)	Headache, confusion, memory or concentration trouble, weakness. More common in older adults or with water pills.	Contact your doctor
Allergic reaction	Rash, hives, swelling, trouble breathing.	Seek emergency care
Liver problems	Yellowing of the skin or eyes, belly pain.	Contact your doctor

These reactions are uncommon. This table of sertraline (Zoloft) side effects isn’t here to worry you. It’s here so you know exactly what to look for and what to do if you ever see it, which helps keep a rare problem from becoming a dangerous one.

The FDA warning about suicidal thoughts

If you’re having thoughts of suicide or self-harm, get help now. Call or text 988 (the Suicide and Crisis Lifeline), or chat at 988lifeline.org. Help is available around the clock. In an emergency, call 911.

Sertraline (Zoloft) carries an FDA boxed warning.

In people under 25, including children and teens, sertraline (Zoloft) and other antidepressants can raise the risk of suicidal thoughts or behavior, most often in the first few weeks of treatment or right after a dose change. Older adults don’t carry that same risk. In fact, sertraline (Zoloft) treatment lowers their risk of suicidal thoughts over time.

If you’re a parent, partner, or caregiver of someone starting sertraline (Zoloft), especially someone younger, here’s what to watch for early on: new or worsening depression, agitation, panic, trouble sleeping, irritability, aggression, or restlessness. If any of these show up, contact your doctor right away.

This warning exists so that everyone involved is watching closely during the weeks that count most, not so you avoid treatment altogether. Close monitoring in the early weeks is standard caution and part of how sertraline (Zoloft) is meant to be used safely.

Don’t stop sertraline suddenly

Stopping sertraline (Zoloft) abruptly can bring on discontinuation symptoms: dizziness, nausea, flu-like feelings, odd “brain zap” sensations, irritability, or anxiety. These are usually mild and pass within a week or two, though they can feel stronger for some people.

The fix isn’t to push through it alone or quit cold turkey. It’s to gradually lower the dose under your doctor’s guidance, which makes the transition safer and more manageable. If you’re thinking about stopping sertraline (Zoloft) for any reason, that conversation should start with your doctor first.

When to contact your doctor

Questions and concerns can arise at any time. Here are a few reasons to contact your doctor or seek immediate help:

• If you’re having thoughts of suicide or self-harm, text or call 988 now. Someone is always available to help.
• Reach out if the common side effects feel severe or haven’t eased after a few weeks. A dose adjustment or a different medication may help.
• Seek emergency care right away for signs of serotonin syndrome or a serious allergic reaction. Unusual bleeding needs immediate attention, too. These can’t wait for a callback.
• Always talk to your doctor before stopping or changing your dose, even if you’re feeling better.

When side effects get in the way of daily life or just don’t feel right, connecting with our online mental health care gives you a straightforward way to get answers without waiting weeks for an appointment.