Domperidone Tablets for Nausea and Digestive Relief: A UK Guide

Domperidone has been used in the UK for decades to treat nausea caused by gastric causes, migraine, opioid medicines, and other conditions. Its unusual pharmacological profile — blocking dopamine receptors at the chemoreceptor trigger zone without crossing into the brain — makes it both effective and distinctly different from other anti-sickness medicines in terms of its side-effect profile.

This guide covers how domperidone works, what it is used for, how to take it safely following current MHRA guidance, and how to access it via an online pharmacy assessment without waiting for a GP appointment.

For a complete clinical overview of nausea and vomiting, including all causes and treatment options, see our nausea and vomiting guide →.

What Is Domperidone and How Does It Work?

Domperidone is a dopamine D2 receptor antagonist with prokinetic properties. It works through two complementary mechanisms that address both the symptom of nausea and the underlying digestive dysfunction that often accompanies it.

Because domperidone does not cross the blood–brain barrier, it does not cause the drowsiness, extrapyramidal side effects (muscle stiffness, restlessness, involuntary movements), or prolactin-related effects associated with metoclopramide when given in standard doses. This makes it the preferred prokinetic antiemetic in conditions where CNS side effects must be avoided — most notably Parkinson’s disease.

What Is Domperidone Used For?

Following the 2014 MHRA safety review, domperidone’s licensed indication in the UK was restricted. It is now licensed specifically for the relief of symptoms of nausea and vomiting. Prescribers may use it in a range of clinical contexts.

Domperidone for Migraine-Related Nausea

Domperidone is particularly effective for migraine because it does two things at once: it blocks the nausea signal at the chemoreceptor trigger zone, and its prokinetic action restores gastric emptying that migraine significantly slows. That second effect matters — oral painkillers and triptans taken during an attack cannot absorb properly until the stomach starts moving again.

Domperidone for Gastroparesis and Functional Dyspepsia

Gastroparesis — delayed gastric emptying in the absence of a mechanical obstruction — causes persistent nausea, early satiety, post-meal bloating, and upper abdominal discomfort. It is most commonly associated with diabetes (diabetic gastroparesis), previous gastric surgery, or neurological conditions, though idiopathic cases occur.

Domperidone’s prokinetic action strengthens antral contractions and coordinates gastroduodenal motility to accelerate emptying of stomach contents. It is the preferred prokinetic agent in Parkinson’s disease because it does not cross the blood–brain barrier and therefore does not worsen the motor symptoms that dopaminergic agonists are used to treat. Metoclopramide — the alternative prokinetic — does cross the BBB and can precipitate or worsen parkinsonian features.

Domperidone Dosage: How to Take It Safely

Domperidone tablets should be swallowed whole with water and taken 15–30 minutes before meals and at bedtime if required for overnight symptom control. If you miss a dose, take it as soon as you remember, unless your next dose is due within two hours — in that case, skip the missed dose and continue your regular schedule. Do not take a double dose.

Understanding Domperidone and Cardiac Safety

In 2014, the MHRA reviewed the safety of domperidone following evidence that it is associated with a small increased risk of serious cardiac arrhythmias (specifically, prolongation of the QT interval) and sudden cardiac death, particularly at higher doses and in older patients. This led to a significant reduction in the licensed maximum dose from 80mg per day to 30mg per day, and restriction of the indication to nausea and vomiting only.

Your prescriber will assess your cardiac suitability before issuing a domperidone prescription. The following factors increase the cardiac risk and are assessed as part of a clinical consultation:

• Known or suspected prolonged QT interval (congenital or acquired)
• Concurrent use of QT-prolonging medicines (including certain antibiotics, antifungals, antipsychotics, and antiarrhythmics)
• Significant electrolyte imbalances (low potassium, low magnesium)
• Clinically significant hepatic impairment (reduces domperidone metabolism via CYP3A4)
• Use of strong CYP3A4 inhibitors (including ketoconazole, clarithromycin, erythromycin, ritonavir)
• Age over 60 and high-dose use (generally avoided in this group)

This safety assessment is the reason domperidone requires a prescription and cannot be sold over the counter — it is not about restricting access but about ensuring appropriate clinical oversight. The online assessment at Access Doctor addresses all these risk factors before a prescription is issued.

Side Effects of Domperidone

Domperidone is generally well tolerated at standard doses. Because it does not cross the blood–brain barrier, it is notably free of the central nervous system side effects seen with metoclopramide and prochlorperazine.

• Dry mouth — common; sip water regularly
• Headache — relatively common; usually mild and transient
• Gastrointestinal effects — abdominal cramps, diarrhoea (uncommon)
• Breast tenderness or galactorrhoea (milk production) — domperidone raises prolactin levels; this is more common at higher doses and with prolonged use
• Cardiac arrhythmia — rare at licensed doses; risk is higher with concurrent QT-prolonging drugs or in those with pre-existing cardiac conditions

Who Should Not Take Domperidone?

• Hepatic impairment (moderate–severe) — contraindicated; impairs domperidone metabolism
• Known or suspected QT prolongation — contraindicated
• Concurrent QT-prolonging medicines — including ketoconazole, clarithromycin, erythromycin, amiodarone, certain antipsychotics — contraindicated
• Prolactinoma — contraindicated; domperidone raises prolactin levels
• Gastrointestinal obstruction, perforation, or haemorrhage — contraindicated
• Pregnancy — not recommended; insufficient safety data
• Breastfeeding — domperidone passes into breast milk; seek prescriber advice (it has also been used unlicensed to stimulate lactation — only under specific clinical supervision)

Domperidone vs Other Antiemetics

Choosing the right antiemetic depends on the cause of nausea, the patient’s medical history, and the need to avoid specific side effects. The table below provides a concise clinical comparison.

For detailed guidance on cyclizine — including how it helps with vertigo-related nausea — see our guide to how cyclizine helps with vertigo-related nausea.

How to Get Domperidone in the UK Without a GP Appointment

Domperidone is a prescription-only medicine (POM) in the UK. It cannot be purchased over the counter. However, you do not need a GP appointment to obtain a prescription — GPhC-registered online pharmacies with pharmacist independent prescribers can assess and prescribe domperidone following a clinical consultation.

When to Seek Urgent Medical Help

See a doctor promptly (same day or next available) if:

• Nausea and vomiting have not improved after 48 hours of treatment with domperidone
• You are unable to keep fluids down and show signs of dehydration
• You develop breast tenderness or unexpected milk production — this may indicate raised prolactin
• You have unexplained weight loss alongside chronic nausea
• You are a Type 1 diabetic with persistent vomiting and elevated blood glucose — consider diabetic ketoacidosis
• Nausea is a new symptom in someone on chemotherapy or with a known cancer diagnosis