Sertraline
Brand names: Lustral, Zoloft
Sertraline is a selective serotonin reuptake inhibitor (SSRI) used for depression, generalised anxiety disorder, panic disorder, social anxiety disorder, obsessive-compulsive disorder and post-traumatic stress disorder.
Adult dose
Dose adjustments
No dosage adjustment is necessary in patients with renal impairment (§4.2).
Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.
US labelling (FDA)
Reference — US labelling, may differ from UKDOSAGE AND ADMINISTRATION Initial Treatment Dosage for Adults Major Depressive Disorder –Sertraline hydrochloride treatment should be administered at a dose of 50 mg once daily. While a relationship between dose and effect has not been established for major depressive disorder, OCD, panic disorder, PTSD or social anxiety disorder, patients were dosed in a range of 50-200 mg/day in the clinical trials demonstrating the effectiveness of Sertraline hydrochloride for the treatment of this indication. Consequently, a dose of 50 mg, administered once daily, is recommended as the initial therapeutic dose. Patients not responding to a 50 mg dose may benefit from dose increases up to a maximum of …
Source: US FDA prescribing information (openFDA / DailyMed), label dated 2019-11-01. Accessed 2026-06-12. US dosing and indications can differ from UK practice — use UK sources for prescribing decisions.
Contraindications
- Hypersensitivity to the active substance or any of the excipients
- Concomitant treatment with irreversible monoamine oxidase inhibitors (MAOIs) — risk of serotonin syndrome with agitation, tremor and hyperthermia. Sertraline must not be initiated for at least 14 days after discontinuation of an irreversible MAOI, and must be discontinued for at least 7 days before starting an irreversible MAOI
- Concomitant intake of pimozide
Side effects
- Nausea — the most common undesirable effect
- Sexual dysfunction: ejaculation failure in men occurred in 14% for sertraline vs 0% placebo in social anxiety disorder trials; libido decreased (common)
- Insomnia (common); anxiety, depression, agitation, nervousness, nightmare, bruxism (common)
- Dizziness, headache, somnolence (common); tremor and movement disorders including extrapyramidal symptoms (uncommon)
- Decreased appetite and increased appetite (common)
- Upper respiratory tract infection, pharyngitis, rhinitis (common)
Interactions
- Irreversible MAOIs — contraindicated (§4.3); risk of serotonin syndrome
- Pimozide — concomitant intake contraindicated (§4.3)
- Drugs highly bound to plasma protein (e.g. warfarin, digitoxin) — because sertraline is tightly bound to plasma protein, coadministration may cause a shift in plasma concentrations potentially resulting in an adverse effect; in a study, sertraline 50-200 mg/day for 21 days gave a mean increase in prothrombin time of 8% relative to baseline with warfarin (US label §Drug Interactions)
Clinical monograph
How it works
It selectively inhibits the reuptake of serotonin (5-HT) at the presynaptic neuronal membrane, increasing serotonergic neurotransmission in the central nervous system.
Prescribing in practice
- Monitor for suicidal thoughts and worsening mood, particularly in the early weeks of treatment and in patients under 25.
- Anxiety, agitation, insomnia and gastrointestinal upset are common early and often settle; risk of hyponatraemia (especially in older patients) and increased gastrointestinal bleeding (consider gastroprotection with concurrent NSAID or anticoagulant).
- Serotonin syndrome can occur with other serotonergic drugs; do not stop abruptly as discontinuation symptoms can occur.
Monitoring
Monitor mood, anxiety and emergence of suicidal ideation, especially early in treatment and in younger patients. Consider checking sodium in those at risk of hyponatraemia, and review for bleeding risk where co-prescribed with NSAIDs or anticoagulants.
Counselling the patient
- It may take several weeks to feel the full benefit, and you may feel more anxious or restless at first.
- Do not stop taking it suddenly; speak to your prescriber about reducing the dose gradually.
- Seek urgent advice if your mood worsens or you have thoughts of harming yourself.
Evidence & guidelines
Guideline-recommended first-line SSRI for depression and anxiety disorders (NICE NG222/CG90).
Reference: NICE CG90 Depression; NICE NG116 PTSD; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
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