Sertraline

Sertraline is a type of antidepressant called a selective serotonin reuptake inhibitor (SSRI). In the UK it is commonly prescribed for conditions such as depression, generalised anxiety disorder, and sometimes for obsessive-compulsive disorder (OCD), panic disorder, or post-traumatic stress disorder (PTSD), depending on individual assessment.

Your GP or mental health prescriber will explain why it has been chosen for you and how it fits with talking therapies or other support. It is not a “happy pill” and may take several weeks before benefits are noticeable.

Sertraline increases the amount of serotonin available between nerve cells in the brain. That is thought to help mood and anxiety symptoms over time when the medicine suits you.

The exact way SSRIs help symptoms is not fully understood. Your prescriber monitors how you respond and whether dose adjustments are appropriate.

Sertraline is usually taken once daily, often in the morning to reduce sleep disturbance, though your prescriber may suggest a different time. Swallow tablets whole with water, with or without food, unless your leaflet says otherwise.

Do not change your dose or stop suddenly without medical advice — stopping too quickly can cause withdrawal-type symptoms. Your GP or psychiatrist may suggest a gradual reduction if treatment is to end.

Common sertraline side effects can include feeling sick, diarrhoea, headache, dry mouth, sweating, trouble sleeping, feeling agitated or shaky, and reduced sex drive. Many effects are mild and improve after the first week or two.

Your patient information leaflet lists fuller detail. Speak to your GP or pharmacist if something worries you or does not settle — they may adjust timing, dose, or review alternatives.

Seek urgent advice (NHS 111, GP same day, or 999 if severe) if you have thoughts of harming yourself, severe agitation or confusion, a very fast heartbeat, fits, severe allergic reaction, or unusual bleeding.

A rare but serious reaction called serotonin syndrome can occur with certain drug combinations — symptoms include high fever, muscle stiffness, confusion, and shivering. If suspected, urgent medical care is needed.

If you miss a dose, take it when you remember unless it is nearly time for the next dose. Do not take two doses together to make up for a missed dose.

If you often forget doses, your pharmacist may suggest reminders. Speak to your GP if you feel the medicine is not working — do not double up on your own.

Sertraline is not suitable for everyone. Your prescriber will consider other medicines you take (especially other antidepressants or migraine treatments), bipolar disorder, epilepsy, bleeding disorders, and heart problems.

Children and young people under 18 are usually assessed by a specialist before SSRIs are used. Always give a full list of prescription and over-the-counter medicines, including painkillers and herbal products such as St John’s wort.

Sertraline can interact with many medicines, including other antidepressants, Tramadol, triptans, some antipsychotics, anticoagulants, and St John’s wort. This list is not exhaustive.

Always check with your pharmacist before starting something new. Your GP remains responsible for safe combinations on your prescription.

If you are pregnant, planning pregnancy, or breastfeeding, speak to your GP or midwife before changing sertraline. Stopping suddenly can be harmful; untreated depression or anxiety also carries risks — your team can help you balance options.

Small amounts pass into breast milk; your prescriber can discuss feeding choices for your situation.

Your GP or psychiatrist may review you regularly when you start sertraline or after dose changes, especially in the first weeks, to check mood, sleep, and side effects.

People with long-term physical health conditions may need occasional blood pressure or other checks as part of wider care — follow what your practice advises.

Your GP may consider other SSRIs (such as Citalopram or Fluoxetine), different classes of antidepressant, or psychological therapies alone or alongside tablets. What is appropriate depends on your symptoms, past response, and other health issues.

Do not switch or stop antidepressants without a prescriber-led plan. Speak to your GP or pharmacist if you have concerns about your current treatment.