NHS-sourced information. Always read the patient information leaflet (PIL) and speak to your pharmacist or GP before starting, stopping or changing this medication.

Home Medications Sertraline
💊 Medication Guide Mental Health

Sertraline

What is Sertraline?

Sertraline is an antidepressant medication belonging to a group called selective serotonin reuptake inhibitors (SSRIs). It is one of the most commonly prescribed antidepressants in the UK and is recommended by NICE for depression, generalised anxiety disorder (GAD), panic disorder, OCD, and PTSD.

How It Works

Sertraline increases the level of serotonin in the brain. Serotonin is a neurotransmitter that plays a key role in mood regulation, sleep, and appetite. By blocking the reuptake of serotonin, sertraline makes more serotonin available in the brain.

How Long Does It Take to Work?

Most people notice an improvement in symptoms within 4-6 weeks, but it can take up to 12 weeks to feel the full benefit. Do not stop taking it if you do not notice an improvement immediately.

Common Side Effects

Side effects are usually mild and improve after the first few weeks:

  • Nausea, diarrhoea or indigestion
  • Headache
  • Dizziness
  • Dry mouth
  • Difficulty sleeping
  • Feeling shaky or agitated
  • Reduced sex drive or difficulty reaching orgasm

Important Information

  • Do not stop taking sertraline suddenly — the dose should be reduced gradually to avoid withdrawal effects
  • In the first few weeks, some people (especially young people under 25) may notice increased suicidal thoughts — seek help immediately if this happens
  • Avoid alcohol while taking sertraline
  • It is generally safe to take sertraline during pregnancy if the benefits outweigh the risks — always discuss with your doctor
Key Facts
Used For
Mental Health
⚠ About Side Effects

All medications can cause side effects, though not everyone gets them. The list below shows the most commonly reported effects. Contact your GP or pharmacist if you are concerned.

Common (may affect more than 1 in 10 people)
Full side effect information will be added shortly. Please refer to the Patient Information Leaflet (PIL) enclosed with your medication.
Less Common (may affect up to 1 in 10 people)
Full side effect information will be added shortly. Please refer to the Patient Information Leaflet (PIL) enclosed with your medication.
Rare (may affect up to 1 in 100 people)
Full side effect information will be added shortly. Please refer to the Patient Information Leaflet (PIL) enclosed with your medication.
Seek immediate medical attention if you experience signs of a serious allergic reaction: swelling of the face, lips, throat, or difficulty breathing.
🔗 Drug Interactions

Always tell your doctor and pharmacist about all medicines you take, including vitamins, supplements, and over-the-counter products. Some interactions can increase side effects or reduce how well a medicine works.

Other medicines: Detailed interaction information for this medication is being prepared. Ask your pharmacist for a medicines review.
Alcohol: Check with your pharmacist whether alcohol is safe to consume with this medication.
Food & drink: Some medications are affected by grapefruit juice or should be taken with food. Check your PIL or ask your pharmacist.
Take the missed dose as soon as you remember. However, if it is nearly time for your next dose, skip the missed dose. Never take a double dose. Check your PIL or ask your pharmacist.
Do not stop taking your medication without speaking to your GP or pharmacist first. Some medications need to be reduced gradually to avoid withdrawal effects or a return of symptoms.
The time varies by medication. Some medicines work within hours; others (such as antidepressants) can take several weeks. Your doctor or pharmacist can advise on what to expect.
You must discuss this with your GP or midwife. Many medications require special consideration during pregnancy or breastfeeding.
Contact your pharmacist or GP. Many side effects are mild and temporary, but your doctor may be able to adjust your dose or switch you to an alternative.
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