Domperidone
Is It Right for You?
A complete guide to Domperidone — what it treats, how it works, dosages, side effects, and when a clinician may prescribe it following an online consultation.
What Is Domperidone?
Domperidone is a peripheral dopamine D2 receptor antagonist used as an antiemetic (anti-nausea medication) and prokinetic agent. It is prescribed to relieve nausea, vomiting, bloating, and the sensation of fullness associated with delayed gastric emptying and gastrointestinal dysmotility.
Unlike older antiemetics such as metoclopramide, domperidone does not readily cross the blood-brain barrier — owing to its quaternary ammonium structure — resulting in significantly fewer central nervous system side effects such as sedation and extrapyramidal reactions. This peripheral selectivity has historically made it a preferred antiemetic for patients who require gastrointestinal motility support with minimal neurological effects.
However, following a European Medicines Agency (EMA) safety review in 2014, the use of domperidone has been restricted due to an association with cardiac QT interval prolongation and an increased risk of sudden cardiac death, particularly at higher doses and in older patients. As a result, domperidone is now recommended only for short-term use at the lowest effective dose in adults and adolescents over 12 years of age.
Domperidone is a prescription-only medication in the UK. A licensed clinician must assess your symptoms and medical history before it can be prescribed — which can now be done quickly and conveniently through a telehealth consultation.
What Conditions Is Domperidone Used For?
Domperidone is prescribed for the symptomatic relief of:
including nausea and vomiting associated with dopaminergic medications used in Parkinson's disease (e.g. levodopa, bromocriptine), where centrally-acting antiemetics cannot be used.
delayed gastric emptying causing bloating, early satiety, nausea, and vomiting.
bloating and upper abdominal discomfort related to dysmotility.
as an adjunct to analgesic therapy.
Due to its cardiac safety profile, domperidone should be used at the lowest effective dose for the shortest possible duration — typically no more than one week for nausea and vomiting. Longer-term use requires specialist assessment and careful risk-benefit evaluation.
How Does Domperidone Work?
Domperidone works by blocking peripheral dopamine D2 receptors in two key locations. In the stomach and upper gastrointestinal tract, it blocks the inhibitory effect of dopamine on smooth muscle, enhancing gastric motility, accelerating gastric emptying, and improving coordination between the stomach and duodenum — its prokinetic effect.
As an antiemetic, domperidone acts at the chemoreceptor trigger zone (CTZ) in the area postrema — a region at the base of the brain that sits outside the blood-brain barrier and can detect nauseating stimuli in the bloodstream. By blocking dopamine receptors at this site, domperidone suppresses the vomiting reflex without causing the central dopamine blockade associated with drugs that penetrate the brain fully.
Domperidone also raises prolactin levels by blocking dopamine's inhibitory effect on the pituitary gland — an endocrine effect that may result in galactorrhoea (breast milk production), gynaecomastia, or menstrual irregularities in some patients.
Dosages & Administration
The correct dose depends on the type and severity of infection, age, weight, and kidney function. Always follow your clinician's instructions. The table below is for general reference only.
Administration Tips
Take domperidone 15 to 30 minutes before meals and, if required, before bedtime. Taking it before eating allows the drug to enhance gastric motility at the time food enters the stomach.
Do not exceed the recommended dose or duration — higher doses and prolonged use significantly increase the risk of cardiac side effects.
Do not crush or chew tablets — swallow whole with water.
Avoid grapefruit juice during treatment, as it can increase domperidone blood levels via CYP3A4 inhibition, raising the risk of side effects.
Inform your clinician immediately if you develop palpitations, chest pain, or fainting — these may indicate a cardiac arrhythmia.
Side Effects of Domperidone
At recommended doses, domperidone is generally well tolerated. The most serious concern is cardiac, particularly with higher doses or in at-risk patients.
- Dry mouth
- Headache
- Diarrhoea
- Raised prolactin levels — causing galactorrhoea (unexpected breast milk), gynaecomastia (breast tissue in men), or menstrual irregularities
- QT interval prolongation and cardiac arrhythmias — including potentially fatal Torsades de Pointes; risk increased with high doses, elderly patients, and concurrent QT-prolonging drugs
- Sudden cardiac death — rare; associated with doses above 30 mg/day and in patients over 60 years
- Extrapyramidal effects — rare with domperidone but possible; dystonic reactions including facial and neck spasm
- Anaphylaxis — rare severe allergic reaction
Domperidone is associated with a dose-dependent risk of QT interval prolongation, which can lead to fatal cardiac arrhythmias. This risk is highest in patients over 60 years, those receiving doses above 30 mg/day, and those taking concurrent QT-prolonging medications. Always disclose your full cardiac history before being prescribed domperidone.
Drug Interactions
Always disclose all prescription drugs, over-the-counter medicines, vitamins, and supplements to your clinician or pharmacist before starting domperidone.
Concurrent use substantially increases the risk of fatal cardiac arrhythmias. These combinations are contraindicated or require extreme caution.
May counteract domperidone's prokinetic effects.
Reduce gastrointestinal motility, opposing domperidone's prokinetic action.
May reduce domperidone absorption if taken simultaneously; separate doses where possible
Important Warnings
Domperidone has been associated with an increased risk of serious ventricular arrhythmias and sudden cardiac death, particularly at doses above 30 mg/day and in patients over 60 years. Use the lowest effective dose for the shortest necessary duration, and avoid in patients with known cardiac arrhythmias, QT prolongation, or significant electrolyte imbalances.
Domperidone is not recommended in patients over 60 years due to significantly increased cardiac risk in this population.
Domperidone is extensively metabolised by the liver. It is contraindicated in patients with moderate or severe hepatic impairment
⚠Domperidone raises prolactin levels, which may cause galactorrhoea, gynaecomastia, and menstrual irregularities. In patients with prolactin-dependent tumours, domperidone is contraindicated.
Speak to a Clinician About Treatment
Getting advice no longer means sitting in a waiting room. Through The GP Service, you can consult with a licensed clinician in minutes — from home, on your lunch break, or wherever works for you. If treatment is clinically appropriate, your clinician can issue a prescription during the consultation. A consultation does not guarantee a prescription.
The treatment you need, when you need it.
Domperidone FAQs
Both are dopamine antagonists used to treat nausea and improve gastric motility. The key difference is that domperidone does not cross the blood-brain barrier to any significant degree, meaning it causes far fewer central side effects such as sedation and extrapyramidal reactions. However, domperidone carries a greater cardiac risk (QT prolongation) than metoclopramide, which has led to its use being restricted in recent years.
Domperidone is absorbed relatively quickly after oral administration, with effects typically felt within 30 to 60 minutes. It is most effective when taken 15 to 30 minutes before meals to coincide with the period of eating.
Current guidelines restrict domperidone to short-term use — typically no longer than one week for nausea and vomiting — due to its cardiac risk. Longer-term use requires specialist assessment, careful risk-benefit analysis, and cardiac monitoring.
Following a 2014 European Medicines Agency safety review, domperidone was found to be associated with a small but significant increase in the risk of serious cardiac arrhythmias and sudden cardiac death, particularly at higher doses and in older patients. Its approved indications and maximum dose were subsequently restricted.
Domperidone should be avoided during pregnancy unless your clinician determines the benefit clearly outweighs the risk. Limited safety data is available for use in human pregnancy. Discuss all options with your clinician.
Yes. Domperidone raises prolactin levels, which stimulates breast milk production. It has been used off-label to increase milk supply in breastfeeding women, but this practice is now discouraged due to cardiac safety concerns. Any such use should only be under specialist medical supervision.