Content

Can Zoloft Cause Insomnia?

Kimberly Rath
Written by:
Kimberly Rath
PharmD
Dr. Henry Bradford
Medical Reviewer:
Dr. Henry Bradford
MD
The medications listed on this website are provided for informational purposes only.
Their inclusion does not guarantee they will be prescribed to any individual, as treatment decisions are ultimately at the discretion of healthcare providers. Healthcare providers may prescribe other medications or recommend non-pharmacological treatment based on the patient’s unique health circumstances and needs. Read more

Zoloft has a boxed warning[1] , the most serious type of warning from the Food and Drug Administration (FDA). Zoloft’s active ingredient sertraline has a risk of suicidal thoughts and behavior in pediatric and young adult patients. Remember to discuss the risks with your healthcare provider.

Zoloft, which is widely known by the generic name sertraline, belongs to a class of medication called selective serotonin reuptake inhibitors (SSRIs). It is commonly prescribed to treat mental health conditions, including social anxiety disorder, major depressive disorder, panic disorder, obsessive-compulsive disorder, premenstrual dysphoric disorder, and post-traumatic stress disorder. While Zoloft can be very effective in reducing symptoms of depression, anxiety, and other conditions, it is known to cause insomnia.

Highlights

  • Zoloft (sertraline) can cause insomnia by altering brain chemistry and affecting REM sleep.
  • Insomnia symptoms from Zoloft may be temporary and often improve as your body adjusts to the medication.
  • If antidepressants cause insomnia, strategies like relaxation techniques, lifestyle changes, and CBT-I can help support better sleep.
  • Consult your healthcare provider for appropriate insomnia treatment if sleep disturbances caused by Zoloft don’t go away or worsen.

Why Does Zoloft Cause Insomnia?

People often assume that insomnia means that you have trouble falling asleep. However, it can involve difficulty falling asleep, staying asleep, or waking up too early and being unable to return to sleep. 

For many, Zoloft insomnia presents as trouble sleeping or disrupted sleep cycles during the first few weeks of treatment. This side effect is common — up to 20% of people experience some type of insomnia when taking Zoloft (sertraline) according to clinical studies[2] .

Mental health care in 24h

Have a detailed mental health assessment and get personalized help for insomnia, depression, or anxiety online.

Zoloft affects brain chemistry and works by increasing the serotonin level in the brain. Serotonin is a chemical neurotransmitter that regulates your mood. However, this change in chemical balance, in addition to affecting other neurotransmitters in the brain, can affect your sleep patterns.

Research[3] shows that Zoloft can reduce REM (rapid eye movement) sleep, an important sleep stage associated with dreaming and memory processing. This can result in not getting enough quality sleep and feelings of chronic fatigue.

Other Side Effects of Zoloft

Besides insomnia, Zoloft can commonly cause other side effects; they typically go away in the first few weeks as your body adjusts to the medication. These include:

  • Headache
  • Nausea
  • Fatigue
  • Dry mouth
  • Diarrhea
  • Dizziness
  • Increased sweating or night sweats
  • Erectile dysfunction

While most people tolerate sertraline well, more serious side effects can occur. These may include serotonin syndrome — a rare but life-threatening condition characterized by confusion, fever, muscle stiffness, and seizures, as well as an increased risk of suicidal thoughts, particularly in adolescents and young adults.

Other potential risks include abnormal bleeding (such as nosebleeds or bleeding gums), low blood sodium levels (which can cause fatigue, nausea, headaches, or irritability), and angle-closure glaucoma, a medical emergency marked by eye pain, redness, and vision changes.

Zoloft Recommended Dosage

The dosage of Zoloft your healthcare provider prescribes will depend on your medical history and the severity of your symptoms. For depression and anxiety disorders, the usual starting dose is 25 mg to 50 mg once per day. Based on how you respond to the medication, the dose can slowly be increased up to a maximum of 200 mg per day.

Doctors often recommend taking Zoloft in the morning to reduce sleep issues. However, if drowsiness becomes a problem, it may be more appropriate to take the medication in the evening.

Zoloft can be taken with or without food, but consistency is important — take it at the same time each day. If a dose is missed, it should be taken as soon as you remember unless it’s almost time for the next dose. In that case, skip the missed dose and continue your regular dosing schedule. Do not double up on the next dose.

The dosages are provided for informational purposes only. Follow the instructions given by your healthcare provider and never exceed the prescribed dose.

"SSRIs, including sertraline (Zoloft), can cause various side effects, including sleep disturbances. To minimize these risks, clinicians often initiate treatment at a low — often subtherapeutic — dose and gradually titrate upward over several weeks to months, as tolerated, until a therapeutic dose is achieved."
Dr. Henry Bradford, MD
Medical provider at MEDvidi

How to Help Yourself Sleep While Taking Zoloft

Although sleep-related issues are a common side effect of this medication, some patients will not experience insomnia while taking Zoloft. However, if you are experiencing insomnia, the following measures could be helpful.

1. Take Zoloft in the Morning

In some patients, the stimulating properties of Zoloft on the central nervous system may cause insomnia, restlessness, and jitteriness, particularly when taken later in the day. If you’re taking Zoloft and can’t sleep, taking it in the morning might help. Sertraline takes several hours to be fully absorbed into your bloodstream. Taking it in the morning allows its levels to decrease by nighttime, which may help reduce the risk of insomnia.

"Sertraline (Zoloft) can affect energy levels in different ways — it may be activating in some patients, increasing the likelihood of insomnia, while in others it can cause fatigue or drowsiness. We often tailor the timing of the dose to help manage these effects. For patients who feel more energized, morning dosing is usually best, whereas those who experience sedation may benefit from taking it in the evening. "
Dr. Henry Bradford, MD
Medical provider at MEDvidi

2. Practice Good Sleep Hygiene

Poor sleeping habits can also cause insomnia. Practicing good sleep hygiene means building good habits and creating a space that makes it easier to fall and stay asleep. This will ensure your body learns to associate your bedroom with sleep. 

Some ways to practice good sleep hygiene include:

  • Keep a consistent sleep schedule, waking up and going to sleep at the same time every day.
  • Avoid having blue light-emitting gadgets in your bedroom, including computers, laptops, and smartphones.
  • Create a dark, quiet, and cool sleeping environment.
  • Invest in a comfortable mattress and pillow.
  • Get some early morning sunshine.

3. Avoid Smoking

Studies[4] indicate that smokers have difficulty sleeping, fragmented sleep, and sleep less due to nicotine in cigarettes. Nicotine acts as a stimulant that can disrupt your sleeping habits, particularly night[5] smoking.

4. Exercise Regularly

Physical activity has been shown[6] to boost your mood, release endorphins, and help you sleep better at night. Early morning workouts can also keep you in a good mood, which also reduces anxiety and depression.

5. Avoid Alcohol and Caffeinated Beverages

Alcohol initially acts as a sedative, so it can make you fall asleep faster. But alcohol intake also disrupts REM sleep[7] and can affect sleep quality, particularly when it is consumed in large amounts. Do not drink alcohol right before going to sleep — or avoid it altogether; remember that no amount of alcohol is entirely risk-free.

Caffeine acts as a stimulant, keeping you up and disrupting sleep patterns. If you drink beverages such as coffee, tea, or sodas at or near bedtime, you may have difficulty falling asleep. One study found caffeine consumed as much as 6 hours before bedtime could affect sleep.

6. Consider Melatonin

Melatonin is a natural hormone produced by a gland in the brain that helps regulate your body’s sleep-wake cycle. Melatonin is a common sleep aid that provides additional support by boosting levels of this hormone, which can help promote sleep in some people. Note that melatonin interacts with many medications, so it’s better to consult with your medical provider before taking it.

7. Use Relaxation Techniques

Mind-body therapies such as meditation, deep breathing exercises, and yoga can help reduce stress[8] and calm the nervous system, making it easier to fall asleep and stay asleep. These techniques promote physical and mental relaxation, helping to quiet racing thoughts and reduce the physiological arousal that often interferes with sleep. Incorporating even a short daily practice of breathwork or gentle movement before bed can support more restorative sleep, especially for individuals experiencing Zoloft sleep side effects or general anxiety-related insomnia.

8. Try Cognitive Behavioral Therapy

Cognitive behavioral therapy for insomnia (CBT-I) has been shown[9] to be effective for long-term insomnia relief. It helps you identify and change thoughts, behaviors, and worries that may be contributing to insomnia. Clinical guidelines from the American Academy of Sleep Medicine recommend[10] CBT-I to treat insomnia, as it has extensive evidence for clinical effectiveness.

9. Talk With Your Doctor

If you are having trouble with sleep while taking Zoloft, talk with your doctor or mental health professional. They may try a lower dosage to help minimize sleep side effects. Sometimes, people still experience side effects at a low dose. In this case, your healthcare provider may recommend changing to a different medication to reduce insomnia symptoms.

See a licensed medical provider for a detailed assessment and personalized help for insomnia.

Withdrawal Syndrome

Zoloft can cause adverse withdrawal symptoms[11] , including insomnia, if you stop taking your medication suddenly. Other symptoms may include headaches, nausea, dizziness, paresthesia, and nightmares, lasting 1-2 weeks after stopping Zoloft. To prevent insomnia and other withdrawal symptoms, it is best to slowly decrease the dosage. Follow your doctor’s guidelines on how to slowly reduce your Zoloft dosage.

When to Contact a Doctor

Reach out to your healthcare provider if you’re experiencing chronic insomnia that lasts longer than a month, is bothersome, or significantly affects your mood or daily functioning. In addition, contact your healthcare provider right away if you experience other serious side effects, such as suicidal thoughts or worsening depression or anxiety.

If you’re experiencing suicidal or self-harming thoughts and require immediate assistance, contact a crisis hotline, such as 911, 988 suicide & crisis lifeline (toll-free), or Samaritans (116-123 or via chat).

In Closing

Although Zoloft is commonly used to treat depression, panic disorder, anxiety disorders, and other mental health conditions, it can cause insomnia. If you experience insomnia caused by Zoloft, talk to your healthcare provider for guidance before stopping the medication. They can give you recommendations on ways to manage insomnia and get better sleep. For personalized recommendations, sign up at MEDvidi today and have an online appointment in 24 hours.

Frequently Asked Questions

Yes. Many people taking Zoloft report waking up at night or early in the morning. This is a common side effect, particularly when first starting treatment.
In many cases, yes. Sertraline insomnia is usually temporary and does go away for most people as the body adjusts to the medication. If it persists beyond a month, talk with your doctor.
Sertraline insomnia typically goes away within a few weeks. However, every individual is different and it may persist longer in some cases. Contact your healthcare provider if insomnia is prolonged and/or severe.
Morning is generally the best time to take Zoloft to reduce the risk of insomnia.
Some people experience fatigue or sedation instead of insomnia. In this case, it may be better to take Zoloft at night.
In the long run, sertraline can help with sleep by reducing symptoms of anxiety or depression, which is a common cause of sleep problems.

Sources

hide
11 sources
  1. DailyMed - ZOLOFT- sertraline hydrochloride tablet, film coated ZOLOFT- sertraline hydrochloride solution, concentrate. Nih.gov. Published 2023.
    Source link
  2. HIGHLIGHTS of PRESCRIBING INFORMATION. ZOLOFT (sertraline hydrochloride) tablets
    Source link
  3. Jindal RD, Friedman ES, Berman SR, Fasiczka AL, Howland RH, Thase ME. Effects of sertraline on sleep architecture in patients with depression. J Clin Psychopharmacol. 2003 Dec;23(6):540-8. doi: 10.1097/01.jcp.0000095345.32154.9a. PMID: 14624183.
    Source link
  4. Amiri S, Behnezhad S. Smoking and risk of sleep-related issues: a systematic review and meta-analysis of prospective studies. Can J Public Health. 2020 Oct;111(5):775-786. doi: 10.17269/s41997-020-00308-3. Epub 2020 Mar 17. PMID: 32185746; PMCID: PMC7501367.
    Source link
  5. Nunez A, Rhee JU, Haynes P, Chakravorty S, Patterson F, Killgore WDS, Gallagher RA, Hale L, Branas C, Carrazco N, Alfonso-Miller P, Gehrels JA, Grandner MA. Smoke at night and sleep worse? The associations between cigarette smoking with insomnia severity and sleep duration. Sleep Health. 2021 Apr;7(2):177-182. doi: 10.1016/j.sleh.2020.10.006. Epub 2020 Nov 18. PMID: 33221256.
    Source link
  6. Banno M, Harada Y, Taniguchi M, Tobita R, Tsujimoto H, Tsujimoto Y, Kataoka Y, Noda A. Exercise can improve sleep quality: a systematic review and meta-analysis. PeerJ. 2018 Jul 11;6:e5172. doi: 10.7717/peerj.5172. PMID: 30018855; PMCID: PMC6045928.
    Source link
  7. Colrain IM, Nicholas CL, Baker FC. Alcohol and the sleeping brain. Handb Clin Neurol. 2014;125:415-31. doi: 10.1016/B978-0-444-62619-6.00024-0. PMID: 25307588; PMCID: PMC5821259.
    Source link
  8. Wang X, Li P, Pan C, Dai L, Wu Y, Deng Y. The Effect of Mind-Body Therapies on Insomnia: A Systematic Review and Meta-Analysis. Evid Based Complement Alternat Med. 2019 Feb 13;2019:9359807. doi: 10.1155/2019/9359807. PMID: 30894878; PMCID: PMC6393899.
    Source link
  9. Reesen JE, van de Kamer FM, van Keeken AE, Ikelaar SLC, van Oppen P, Batelaan N, Lancee J, van Someren EJW, van Nassau F. Applying therapist-guided digital cognitive behavioral therapy for insomnia in psychiatry: a mixed-methods process evaluation. BMC Psychiatry. 2025 Apr 28;25(1):428. doi: 10.1186/s12888-025-06824-1. PMID: 40296081; PMCID: PMC12039299.
    Source link
  10. Arnold MJ. Behavioral and Psychological Treatments for Chronic Insomnia Disorder: Updated Guidelines From the American Academy of Sleep Medicine. American Family Physician. 2022;105(1):97-98.
    Source link
  11. National Alliance on Mental Illness. Sertraline (Zoloft) | NAMI: National Alliance on Mental Illness. Nami.org. Published 2020.
    Source link
Show more
Kimberly Rath
Written by:
Kimberly Rath
PharmD
Dr. Henry Bradford
Medical Reviewer:
Dr. Henry Bradford
MD
Share

Content

Recommended Articles

Join our newsletter

Sign up to receive mental health news and tips delivered right in your inbox every month.

Take the first step today:

book an appointment to get your symptoms assessed and obtain a prescription online.

Evidence Based

This article is based on scientific evidence, written by experts and fact checked by experts.

Our team of experts strive to be objective, unbiased, honest and to present both sides of the argument.

This article contains scientific references. The numbers
in the parentheses (1, 2, 3) are clickable links to peer-reviewed scientific papers.