Buy Metoclopramide
Metoclopramide

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A medication used to treat nausea and vomiting and to help empty the stomach in conditions where digestion is slow.


Ingredient
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In Stock
Delivery
Airmail (14-21 days) | EMS trackable (5-9 days)
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Product Sheet

Alternative/Local Brand
Maxolon
Active Ingredient(s)
Metoclopramide
Primary Category
Anti-sickness
Therapeutic Class
Alimentary Tract, Drugs for Functional Gastrointestinal Disorders, Propulsives
Pharmacological Class
Dopamine Receptor Antagonist
Indications
Nausea and vomiting, Gastroparesis (migraine-related), Post-operative nausea
Contraindications
Gastrointestinal bleeding, Parkinson's disease, Epilepsy, Pheochromocytoma
Minor Side Effects
Drowsiness, Restlessness, Diarrhoea
Moderate Side Effects
Dizziness, Tiredness, Low blood pressure
Serious Side Effects
Involuntary muscle movements, Neck stiffness, Fast or slow heart rate, Hallucinations
Dosage Forms
Tablet, Oral solution, Injection
Administration Route
Oral
Mechanism of Action
Metoclopramide works by blocking dopamine receptors in the part of the brain that triggers vomiting. It also stimulates the muscles of the upper digestive tract, speeding up the emptying of the stomach into the intestines.
Prescription Status
Rx
Patient Summary
A medication used to treat nausea and vomiting and to help empty the stomach in conditions where digestion is slow.
Onset Time
30-60 minutes
Duration
1-2 hours
Storage Instructions
Store in a cool, dry place
Drug Interactions
Levodopa, Anticholinergics, Opioid painkillers, Alcohol
Age Restrictions
In the UK, only used in children for chemotherapy or surgery-induced nausea
Pregnancy Use
Can be used if clinically necessary; consult your GP.
Alternative Drugs
Domperidone, Ondansetron, Cyclizine

What is Metoclopramide?

Metoclopramide is a prescription medication classified under Digestive Health in Hong Kong. The active ingredient is metoclopramide itself, and it is commercially available as a 10 mg pill. The Drug Office of the Hong Kong Department of Health lists metoclopramide as a prescription-only (Rx) product. It is intended to treat conditions related to nausea, vomiting, and delayed gastric emptying.

How Metoclopramide Works in the Body

Metoclopramide exerts its therapeutic effect through several linked mechanisms:

  • Dopamine D₂-receptor antagonism - By blocking dopamine receptors in the chemoreceptor trigger zone of the brain, metoclopramide reduces the stimulus to vomit.
  • Serotonin 5-HT₄ agonism - Activation of 5-HT₄ receptors in the gastrointestinal (GI) tract enhances the release of acetylcholine, which stimulates smooth-muscle contraction and promotes gastric motility.
  • Accelerated gastric emptying - The combined central anti-emetic action and peripheral pro-kinetic activity shorten the time food remains in the stomach, helping relieve symptoms of gastroparesis and reflux.

The onset of anti-emetic action usually occurs within 30 minutes after oral ingestion, with peak effects noted at about 1-2 hours. The drug’s half-life is roughly 5-6 hours, allowing dosing up to four times daily when clinically indicated.

Conditions Treated by Metoclopramide

Metoclopramide is approved by the Hong Kong Department of Health for the following indications:

  • Nausea and vomiting caused by chemotherapy, radiotherapy, surgery, or gastro-intestinal disorders.
  • Gastroparesis (delayed gastric emptying) in adults, particularly diabetic gastroparesis.
  • Reflux-related symptoms that do not respond adequately to standard acid-suppression therapy.

These uses are supported by clinical guidelines and the product’s labeling in Hong Kong. The medication is typically prescribed for short-term courses, as prolonged use increases the risk of movement-disorder side effects.

Evidence-Based Off-Label Uses

Some clinicians prescribe metoclopramide for purposes that are not listed on the official label but have supporting evidence:

  • Facilitating lactation - Small studies suggest that low-dose metoclopramide can increase milk production in postpartum women. This use is off-label in Hong Kong and should be undertaken only under specialist supervision.
  • Intractable hiccups - Case reports indicate benefit, though evidence is limited.

Disclaimer: Off-label use requires medical supervision and an individualized risk-benefit assessment.

Who Should (and Should Not) Use Metoclopramide?

Ideal Candidates

  • Adults experiencing acute or chronic nausea/vomiting where other anti-emetics are insufficient.
  • Patients with documented gastroparesis who need enhanced gastric motility.

Absolute Contraindications

  • Known hypersensitivity to metoclopramide or any of its excipients.
  • Pheochromocytoma (risk of hypertensive crisis).
  • Severe gastrointestinal obstruction, perforation, or haemorrhage (the drug’s pro-kinetic effect can worsen these conditions).
  • Seizure disorders not well controlled.
  • Parkinson’s disease or other extrapyramidal disorders.

Relative Contraindications & Precautions

  • Pregnancy - Category B; use only if benefits outweigh potential risks, especially in the first trimester.
  • Breastfeeding - Low-dose use may be considered for lactation support; monitor infant for side effects.
  • Renal impairment - Dose reduction recommended (see Dosing section).
  • Elderly patients - Increased susceptibility to extrapyramidal side effects; start at the lowest effective dose and monitor closely.

If you fall into any of the contraindicated categories, discuss alternative therapies with your healthcare provider.

Safety Profile: Side Effects and Interactions

Common Side Effects

  • Drowsiness or fatigue
  • Restlessness, anxiety, or insomnia
  • Diarrhoea or abdominal cramping
  • Dry mouth

These effects are usually mild and transient. If they persist or become bothersome, inform your prescriber.

Serious Adverse Events

  • Extrapyramidal symptoms (e.g., dystonia, akathisia) - May appear within hours to days of starting therapy.
  • Tardive dyskinesia - A potentially irreversible movement disorder that risk increases after 4-6 weeks of continuous use.
  • Neuroleptic malignant syndrome - Rare but life-threatening; characterized by high fever, muscle rigidity, autonomic instability.
  • Severe allergic reactions - Rash, swelling, or breathing difficulty warrant immediate medical attention.

Drug Interactions

  • CNS depressants (e.g., benzodiazepines, opioids) - May enhance sedation.
  • Anticholinergic agents - May counteract metoclopramide’s pro-kinetic effect.
  • Other dopamine antagonists - Additive risk of extrapyramidal reactions.
  • CYP2D6 inhibitors (e.g., fluoxetine, quinidine) - Can raise metoclopramide plasma levels, increasing side-effect risk.
  • QT-prolonging drugs - Concomitant use may raise the chance of cardiac arrhythmias; ECG monitoring is advised for high-risk patients.

Food and Lifestyle Interactions

  • Metoclopramide may be taken with or without food; however, taking it with a small amount of food can reduce occasional stomach irritation.
  • Alcohol does not have a direct pharmacologic interaction, but both alcohol and metoclopramide can cause drowsiness; avoid excessive intake.
  • Caution when driving or operating machinery until you know how the medication affects you.

General Advice: Always provide a full medication list-including over-the-counter products, supplements, and herbal remedies-to the prescribing clinician.

How to Take Metoclopramide

Standard Dosing for Adults

  • Nausea/Vomiting: 10 mg taken before meals and at bedtime, up to four times daily (maximum 40 mg per day).
  • Gastroparesis: 10 mg four times daily, taken 30 minutes before meals and at bedtime.
  • Maximum duration: Do not exceed 4-6 weeks of continuous therapy without a clinical review, to minimize the risk of tardive dyskinesia.

Adjustments for Special Populations

  • Renal impairment (eGFR < 30 mL/min): Reduce dose to 5 mg three times daily; monitor for accumulation.
  • Elderly (≥ 65 years): Start at 5 mg three times daily and titrate cautiously.
  • Pregnancy & lactation: Use the lowest effective dose; discuss risks with a specialist.

Administration Tips

  • Swallow the 10 mg pill whole; do not crush or split unless explicitly instructed.
  • Store at room temperature, away from excess heat and moisture.
  • If a dose is missed, take it as soon as you remember unless the next scheduled dose is within a few hours-do not double up.

Overdose Management

  • Symptoms: Restlessness, severe drowsiness, seizures, cardiac arrhythmias.
  • First-aid: Seek emergency medical care immediately. Activated charcoal may be administered if presentation is early. No specific antidote exists; treatment is supportive and symptomatic.

Discontinuation

  • Abrupt cessation is generally safe; however, if you have been on high doses for several weeks, the prescriber may recommend a taper to reduce the likelihood of withdrawal dyskinesia.

Monitoring and Follow-Up

  • Renal function tests (serum creatinine, eGFR) before initiating therapy and periodically thereafter in patients with known kidney disease.
  • Neurological assessment for early signs of extrapyramidal symptoms-especially after the first week of treatment.
  • Blood glucose monitoring is advisable for diabetic patients, as gastric emptying acceleration can affect glycaemic control.
  • Electrocardiogram (ECG) if you are taking other QT-prolonging agents or have a history of cardiac arrhythmias.

Patients should schedule a follow-up visit within 2 weeks of starting metoclopramide to evaluate efficacy and tolerability.

Storage and Handling

  • Keep the bottle tightly closed and store below 25 °C (77 °F), protected from light and moisture.
  • Do not use the medication past the expiration date printed on the packaging.
  • Dispose of unused tablets according to local pharmacy guidelines-do not flush down the toilet.

Medication-Specific Glossary

Dopamine D₂-receptor antagonist
A drug that blocks dopamine receptors of the D₂ subtype, reducing dopamine-mediated stimulation of the brain’s vomiting center.
Tardive dyskinesia
A potentially irreversible movement disorder characterized by repetitive, involuntary facial and limb movements, associated with long-term dopamine-blocking therapy.
Gastric emptying
The process by which the stomach transfers its contents to the small intestine; metoclopramide accelerates this process.

Medical Disclaimer

This article provides educational information about metoclopramide and is not a substitute for professional medical advice. Treatment decisions, including the use of metoclopramide for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.

Metoclopramide FAQ

Can metoclopramide be used for motion sickness?

Metoclopramide has anti-emetic properties and may reduce nausea associated with motion sickness, but it is not a first-line therapy for this indication in Hong Kong. Other agents, such as dimenhydrinate, are typically preferred due to a more favorable safety profile.

What should I do if I notice involuntary facial movements while taking metoclopramide?

Involuntary movements could signal early tardive dyskinesia. Stop the medication immediately and seek prompt medical evaluation. Early detection improves the chance of preventing permanent symptoms.

Is it safe to take metoclopramide while pregnant?

Metoclopramide is classified as pregnancy category B in many jurisdictions, indicating no proven risk in animal studies. Nevertheless, it should be prescribed during pregnancy only when the potential benefits outweigh the potential risks, and always under specialist supervision.

How long can I stay on metoclopramide for chronic gastroparesis?

Long-term use beyond 4-6 weeks is generally discouraged because of the risk of tardive dyskinesia. If chronic symptom control is needed, your physician may consider intermittent courses or alternative pro-kinetic agents.

Can metoclopramide interact with my antidepressant medication?

Some antidepressants, particularly selective serotonin reuptake inhibitors (SSRIs) that inhibit CYP2D6, can increase metoclopramide levels and heighten side-effect risk. Discuss your full medication list with your prescriber to assess interaction potential.

Does eating food affect how metoclopramide works?

Metoclopramide may be taken with or without food. Taking it with a small amount of food can lessen occasional stomach irritation, but the medication’s absorption is not significantly altered by meals.

What are the signs of an allergic reaction to metoclopramide?

Symptoms include rash, itching, swelling (especially of the face, tongue, or throat), severe dizziness, and breathing difficulties. Seek emergency medical care if any of these occur.

Is metoclopramide covered by Hong Kong’s public health insurance?

Coverage varies depending on the specific public or private insurance plan. Generally, prescription medications approved by the Hong Kong Department of Health are eligible for reimbursement under the Hospital Authority’s subsidy scheme, but you should verify with your insurer.

Can I travel internationally with metoclopramide tablets?

Yes, but keep the medication in its original labelled container, carry a copy of the prescription, and be aware of any import restrictions in the destination country. In some jurisdictions, a doctor’s note may be required for controlled or prescription-only drugs.

Why is there a limit on the total daily dose of metoclopramide?

Exceeding the recommended maximum (typically 40 mg per day) increases the likelihood of severe side effects, particularly extrapyramidal reactions and cardiac arrhythmias. Adhering to the prescribed dose helps maintain efficacy while minimizing risk.

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