Metoclopramide is a prescription anti-sickness medicine. It relieves nausea and vomiting and helps the stomach empty, so it is used in migraine, after surgery, with chemotherapy and in diabetic gastroparesis. Because of a risk of movement side effects, it is intended for short courses — usually no more than five days.
What is Metoclopramide?
Metoclopramide is Schedule 4 in South Africa — prescription-only — and appears under several names:
| Product | Form |
|---|---|
| Metoclopramide (generics), Setin | Tablet 10 mg |
| Adco-Contromet, Clopamon | Syrup |
| Pramalon, and other generics | Injection 10 mg/2 ml |
It works in two places at once, which is what makes it distinctive:
- In the brain, it blocks dopamine D2 receptors in the chemoreceptor trigger zone — the area that detects circulating substances and triggers vomiting. This is the anti-nausea effect.
- In the gut, it is a prokinetic: it increases the strength and coordination of stomach contractions and relaxes the outlet, so the stomach empties faster into the small intestine.
That second action is what separates it from most anti-sickness medicines. It does not merely suppress the sensation of nausea — it moves the stomach contents along. That makes it particularly useful where delayed stomach emptying is part of the problem, such as in migraine (where the stomach slows, which is also why painkillers work poorly during an attack) and in diabetic gastroparesis.
Blocking dopamine is also the source of its main risk. Dopamine is central to controlling movement, so blocking it can cause involuntary muscle and movement problems. This is the reason for the strict limit on how long it is used.
What is Metoclopramide commonly used for?
- Nausea and vomiting from many causes, including migraine, medicines and infections.
- Migraine, both to relieve nausea and to help the stomach absorb painkillers taken during an attack.
- Post-operative nausea and vomiting.
- Chemotherapy- and radiotherapy-induced nausea.
- Diabetic gastroparesis, where nerve damage slows stomach emptying.
- Reflux symptoms, in some cases, by speeding gastric emptying.
- Before procedures, to empty the stomach — for example before an endoscopy or radiological examination.
Treatment is deliberately short. Guidance restricts metoclopramide to short-term use — commonly a maximum of five days — because the risk of movement side effects rises with duration and cumulative dose. This is a genuine restriction based on evidence of harm, not excessive caution.
It treats the symptom, not the cause. Persistent vomiting needs a diagnosis.
How Metoclopramide fits into this medicine category
| Group | Examples | Role |
|---|---|---|
| Dopamine antagonists (prokinetic) | Metoclopramide, domperidone | Nausea plus faster stomach emptying |
| Antihistamine anti-emetics | Promethazine, cyclizine | Motion sickness, vertigo, general nausea |
| 5-HT3 antagonists | Ondansetron | Chemotherapy and post-operative nausea |
| Antispasmodics | Hyoscine | Cramping and colicky pain |
| Proton pump inhibitors | Lansoprazole | Reflux and ulcers — acid, not nausea |
| Anti-diarrhoeals | Loperamide | Diarrhoea |
Domperidone works similarly but crosses into the brain far less, so it causes fewer movement effects — though it has its own cardiac cautions. See the digestive and stomach medicines hub.
What to check before using Metoclopramide
Do not exceed the prescribed duration, usually five days. Movement side effects are strongly related to how long and how much you take.
Tell your doctor or pharmacist if you:
- Are under 20 years old. Young people, especially children and adolescents, are considerably more likely to develop acute movement reactions, and metoclopramide is restricted in this group.
- Are elderly, where the risk of longer-term movement disorders is higher.
- Have Parkinson’s disease. Metoclopramide blocks dopamine and can markedly worsen it — generally avoided.
- Have epilepsy.
- Have kidney or liver disease, where lower doses are needed.
- Have a bowel obstruction, perforation, or recent gut surgery — speeding up the gut would be harmful.
- Have gastrointestinal bleeding.
- Have a phaeochromocytoma, a rare adrenal tumour.
- Have depression, which can be worsened.
- Have heart rhythm problems.
- Are pregnant or breastfeeding.
- Take antipsychotics such as risperidone, which also block dopamine — the movement risks add up.
- Take an SSRI antidepressant, opioids, levodopa, or medicines affecting heart rhythm.
Avoid alcohol, which adds to drowsiness.
Do not drive until you know how it affects you.
Possible cautions and when to ask a pharmacist or doctor
Common effects are drowsiness, tiredness, restlessness, diarrhoea and low mood.
Stop and seek medical attention urgently if you develop:
- Uncontrolled muscle spasms, particularly of the face, neck, jaw, tongue or eyes — including the head or neck twisting to one side, the eyes rolling upward, or difficulty speaking or swallowing. These are called acute dystonic reactions. They usually appear within the first days, are much more common in young people, and are frightening but treatable — go to an emergency department, as they respond well to treatment.
- An inability to sit still, with intense inner restlessness (akathisia).
- Tremor, muscle stiffness, slowed movement or a shuffling walk — Parkinson-like effects.
- Repetitive involuntary movements of the face, tongue or lips, such as lip-smacking or chewing motions. Tardive dyskinesia can be permanent, is more likely with longer use and in older people, and must be reported immediately.
- High fever with muscle stiffness, confusion, sweating and a fast pulse — a rare emergency.
- A seizure.
- Swelling of the face, lips or tongue, or difficulty breathing.
- A fast or irregular heartbeat, or fainting.
These movement reactions are the reason for the short course, and knowing what they look like matters — they are easy to mistake for something else, particularly in a young person.
Metoclopramide can also raise prolactin, causing breast tenderness or enlargement, milk production, or irregular periods. Mention it if it occurs.
See a doctor rather than continuing if:
- Vomiting persists, or you cannot keep fluids down.
- You have severe abdominal pain, or a swollen, tender abdomen.
- You are vomiting blood, or vomit resembling coffee grounds.
- You have black, tarry stools.
- You have signs of dehydration — dark or scanty urine, dizziness on standing.
- Vomiting follows a head injury, or comes with severe headache, stiff neck or confusion.
Related medicine guides
Frequently asked questions
What is metoclopramide used for? Nausea and vomiting — from migraine, surgery, chemotherapy or medicines — and to help the stomach empty in conditions such as diabetic gastroparesis.
What is metoclopramide 10 mg used for? The standard adult tablet strength, used for nausea and vomiting and to speed stomach emptying. Follow the prescribed course.
How long can I take it? Usually no more than five days. The risk of movement side effects rises with duration, which is why the limit exists.
Why is it used for migraine? It relieves the nausea and speeds stomach emptying, which helps painkillers be absorbed — the stomach slows during an attack.
Can children take it? It is restricted in children and adolescents, who are much more likely to get acute movement reactions. Only if a doctor specifically prescribes it.
What are the movement side effects? Muscle spasms of the face, neck or eyes, inner restlessness, tremor and stiffness, or repetitive involuntary mouth movements. Seek urgent medical attention if any occur.
Is it the same as an antacid? No. It treats nausea and speeds stomach emptying; it does not reduce stomach acid.
Can I drink alcohol with it? Avoid it — alcohol adds to the drowsiness.