Escitalopram
Brand names: Cipralex
Escitalopram is a selective serotonin reuptake inhibitor (SSRI) used for depression and anxiety disorders.
Adult dose
Dose adjustments
Dosage adjustment is not necessary in patients with mild or moderate renal impairment. Caution is advised in patients with severely reduced renal function (creatinine clearance less than 30 ml/min) (§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.
Contraindications
- Hypersensitivity to the active substance or to any of the excipients
- Concomitant treatment with non-selective, irreversible MAO inhibitors — risk of serotonin syndrome with agitation, tremor, hyperthermia
- Combination with reversible MAO-A inhibitors (e.g. moclobemide) or the reversible non-selective MAO inhibitor linezolid — risk of serotonin syndrome
- Known QT interval prolongation or congenital long QT syndrome
- Concomitant use with medicinal products known to prolong the QT interval
Side effects
- Headache (very common) and nausea (very common)
- Insomnia, somnolence, dizziness, paraesthesia, tremor (common)
- Diarrhoea, constipation, vomiting, dry mouth (common)
- Sweating increased (common); arthralgia and myalgia (common)
- Decreased appetite, increased appetite, weight increased (common)
- Anxiety, restlessness, abnormal dreams, libido decreased, anorgasmia in women (common); serotonin syndrome (rare); QT prolongation and ventricular arrhythmia including torsade de pointes (not known)
Interactions
- Monoamine oxidase inhibitors (MAOIs) — increased risk of serotonin syndrome; contraindicated, including MAOIs such as linezolid or intravenous methylene blue
- Pimozide — concomitant use with racemic citalopram increases plasma concentrations of pimozide, a drug with a narrow therapeutic index (US label)
- Medicinal products known to prolong the QT interval — contraindicated (§4.3)
- Other serotonergic drugs (including opioids, lithium, buspirone, amphetamines, tryptophan and St John's Wort) — increased risk of serotonin syndrome; monitor particularly during initiation and dosage increases (US label)
Clinical monograph
How it works
As the active enantiomer of citalopram, it selectively inhibits serotonin reuptake at the presynaptic transporter, increasing synaptic serotonin availability.
Prescribing in practice
- Escitalopram causes dose-dependent QT-interval prolongation, so it should be avoided in known QT prolongation and used cautiously with other QT-prolonging drugs or electrolyte disturbance.
- There is an increased risk of suicidal thoughts and behaviour early in treatment, particularly in younger adults, warranting close monitoring.
- Risk of hyponatraemia, gastrointestinal bleeding and serotonin syndrome increases with concomitant drugs such as NSAIDs, anticoagulants and other serotonergic agents.
Monitoring
Monitor mood and suicidal ideation early in treatment and consider ECG and electrolytes where cardiac risk or QT-prolonging therapy is present.
Counselling the patient
- Antidepressant effect may take a few weeks; continue treatment as prescribed.
- Report worsening mood or thoughts of self-harm, especially in the first weeks.
- Do not stop suddenly, as discontinuation symptoms can occur; taper under guidance.
Evidence & guidelines
Escitalopram is a recommended first-line SSRI in NICE depression guidance, and the MHRA has highlighted its dose-dependent QT-prolongation risk.
Reference: MHRA Drug Safety Update 2011; NICE NG222; 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.
- SMART Risk Score for Recurrent CVD · Cardiovascular Risk
- PCSK9 Inhibitor Eligibility Assessment · Lipid Management
- Immune-Related Adverse Events (irAE) -- GI Toxicity Colitis Grading · Oncology-Related GI
- irAE Hepatitis Grading (CTCAE) · Immunotherapy
- DIPSS — Dynamic International Prognostic Scoring System for Myelofibrosis · Cancer Prognosis
- BALL Score for Relapsed/Refractory CLL · Leukaemia
- Acute Behavioural Disturbance / Rapid Tranquillisation · RCEM 2022; RCPsych 2022; NICE NG10
- Self-Harm Presentation · NICE NG225 (2022)
- Capacity Assessment (Mental Capacity Act) · MCA 2005; Code of Practice
- Acute Psychosis Management · NICE CG178 2014
- Depression Management · NICE CG90 2022
- Lithium Therapy Monitoring · NICE CG185