Dapoxetine
Brand names: Priligy
Dapoxetine is a short-acting selective serotonin reuptake inhibitor licensed specifically for the on-demand treatment of premature ejaculation in adult men.
Adult dose
Dose adjustments
SPC §4.2: 'Caution is advised in patients with mild or moderate renal impairment. Priligy is not recommended for use in patients with severe renal impairment.' No numeric dose adjustment is given.
SPC §4.2/§4.3: contraindicated in patients with moderate and severe hepatic impairment (Child-Pugh Class B and C).
Dose independently re-sourced from UK Summary of Product Characteristics (SPC) via MHRA Products — clinician-reviewed. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Hypersensitivity to the active substance or to any of the excipients listed in section 6.1
- Significant pathological cardiac conditions: heart failure (NYHA class II-IV); conduction abnormalities such as AV block or sick sinus syndrome; significant ischaemic heart disease; significant valvular disease; a history of syncope
- A history of mania or severe depression
- Concomitant treatment with MAOIs, or within 14 days of discontinuing an MAOI (an MAOI should not be given within 7 days after dapoxetine is stopped)
- Concomitant treatment with thioridazine, or within 14 days of discontinuing it (thioridazine not within 7 days after dapoxetine is stopped)
- Concomitant treatment with SSRIs, SNRIs, tricyclic antidepressants or other serotonergic medicinal/herbal products (e.g. L-tryptophan, triptans, tramadol, linezolid, lithium, St John's Wort), or within 14 days of discontinuing them (not within 7 days after dapoxetine is stopped)
- Concomitant potent CYP3A4 inhibitors such as ketoconazole, itraconazole, ritonavir, saquinavir, telithromycin, nefazodone, nelfinavir, atazanavir
- Moderate and severe hepatic impairment
Side effects
- Phase 3 trials, most common and dose related (30 mg / 60 mg as needed): nausea 11.0% / 22.2%; dizziness 5.8% / 10.9%; headache 5.6% / 8.8%; diarrhoea 3.5% / 6.9%; insomnia 2.1% / 3.9%; fatigue 2.0% / 4.1% (§4.8)
- Most common adverse events leading to discontinuation: nausea (2.2% of treated subjects) and dizziness (1.2%) (§4.8)
- Syncope and orthostatic hypotension reported in clinical trials; prodromal symptoms include nausea, dizziness/lightheadedness, palpitations, asthenia, confusion and diaphoresis, generally within the first 3 hours after dosing (§4.4, §4.8)
- Cases of syncope with bradycardia or sinus arrest were considered vasovagal; patients should avoid situations where injury could result (e.g. driving or operating hazardous machinery) if syncope or prodromal symptoms occur (§4.4)
- Also listed in the §4.8 table (frequency bands not readable from the extracted table): anxiety, agitation, insomnia, abnormal dreams, decreased libido, somnolence, tremor, paraesthesia, blurred vision, mydriasis, tinnitus, vertigo, sinus bradycardia, tachycardia, flushing, hypotension, vomiting, constipation, dry mouth, hyperhidrosis, erectile dysfunction, blood pressure increased (§4.8)
- Serotonin-related reactions (arrhythmia, hyperthermia, serotonin syndrome) with serotonergic recreational drugs such as ketamine, MDMA and LSD (§4.4)
- Increased somnolence and dizziness with sedative recreational drugs (narcotics, benzodiazepines); alcohol may enhance neurocardiogenic adverse events such as syncope (§4.4)
Interactions
- MAO inhibitors - contraindicated (14 days after stopping an MAOI; 7 days after stopping dapoxetine): serious, sometimes fatal reactions with SSRI plus MAOI
- Thioridazine - contraindicated: dapoxetine inhibits CYP2D6 and is expected to raise thioridazine levels, augmenting QTc prolongation
- Other SSRIs and serotonergic medicinal/herbal products (SNRIs, TCAs, L-tryptophan, triptans, tramadol, linezolid, lithium, St John's Wort) - contraindicated
- Potent CYP3A4 inhibitors (e.g. ketoconazole, itraconazole, ritonavir) - contraindicated; moderate CYP3A4 inhibitors - dose restricted to 30 mg with caution
- Potent CYP2D6 inhibitors / CYP2D6 poor metabolisers - caution if increasing the dose to 60 mg
- PDE5 inhibitors - dapoxetine should not be used in men with erectile dysfunction who are using PDE5 inhibitors
- Medicinal products with vasodilatation properties (alpha adrenergic receptor antagonists, nitrates) - prescribe with caution (possible reduced orthostatic tolerance)
- Alcohol and recreational drugs - advise patients not to combine them with dapoxetine
- CNS active medicinal products (antiepileptics, antidepressants, antipsychotics, anxiolytics, sedative hypnotics) - not systematically evaluated; caution advised
- The remainder of §4.5 (pharmacokinetic interactions) was cut off in the retrieved text - verify against the full SPC
Monitoring
- Orthostatic test before starting (blood pressure and pulse rate, supine and standing) and history of orthostatic events; avoid treatment if orthostatic reaction documented or suspected (§4.4)
- Benefit-risk appraisal after the first four weeks (or at least after 6 doses), then re-evaluate at least every six months (§4.2)
- Prodromal symptoms of syncope and orthostatic reactions, especially before any escalation to 60 mg (§4.2, §4.4)
- Counsel on adequate hydration and on lying down or sitting with head between knees if prodromal symptoms occur (§4.4)
Clinical monograph
How it works
By inhibiting presynaptic serotonin reuptake it enhances serotonergic neurotransmission in the pathways controlling the ejaculatory reflex, thereby delaying ejaculation.
Prescribing in practice
- It can cause orthostatic hypotension and syncope, so it is contraindicated in significant cardiac disease and patients should be counselled to recognise prodromal symptoms.
- It is taken only on demand a few hours before anticipated sexual activity rather than continuously.
- Avoid co-administration with monoamine oxidase inhibitors and other serotonergic drugs because of the risk of serotonin syndrome.
Monitoring
No routine laboratory monitoring is required, but assess cardiovascular status and orthostatic tolerance before and during treatment.
Counselling the patient
- Take a single dose only when sexual activity is anticipated, not every day.
- If you feel faint, lie down with your legs raised and avoid situations where fainting could cause injury.
- Do not combine with recreational drugs or alcohol, which can worsen dizziness.
Evidence & guidelines
Randomised controlled trials demonstrate that dapoxetine increases intravaginal ejaculatory latency time compared with placebo in premature ejaculation.
Reference: BAUS / EAU PE guidelines; SmPC; Confirm identity and dosing against the manufacturer SPC (eMC) and NICE. 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).
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Curated clinical cross-links plus same-class fallbacks.
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