Motilium is a brand name for the oral pill containing the active ingredient domperidone. It belongs to the Digestive Health therapeutic class and is used as a gastric prokinetic and anti-emetic. In Hong Kong, Motilium (10 mg tablets) is a prescription-only medication regulated by the Department of Health. The product is marketed in several formulations, but the focus here is the 10 mg tablet.
Domperidone is a peripheral dopamine-D₂ receptor antagonist. By blocking dopamine receptors in the gastrointestinal (GI) tract, it:
Because domperidone does not readily cross the blood-brain barrier, its central nervous system effects are limited compared with other dopamine antagonists. Onset of anti-emetic effect typically occurs within 30 minutes, with peak plasma concentrations reached in about 1-2 hours after oral intake. The drug is metabolized mainly by the liver enzyme CYP3A4 and has an elimination half-life of roughly 7-9 hours.
Motilium is approved in Hong Kong for the following indications:
These uses are based on clinical studies demonstrating improved gastric emptying time and reduced vomiting episodes when domperidone is administered at recommended doses.
Domperidone is sometimes prescribed off-label to increase breast milk production in lactating mothers. Small observational studies have shown a rise in prolactin levels and milk volume, but the drug is not approved for this purpose by Hong Kong regulatory authorities.
Disclaimer: Off-label use requires medical supervision and individualized risk assessment, especially because domimperidone can affect cardiac conduction.
These effects are usually transient and resolve without intervention.
Patients experiencing palpitations, fainting, or persistent muscle stiffness should seek immediate medical care.
Practical tip: Inform your healthcare provider of all prescription medicines, over-the-counter products, and herbal supplements before starting Motilium.
Standard adult dosing:
Nausea/vomiting: 10 mg taken up to three times daily, ideally 30 minutes before meals and at bedtime.
Gastroparesis: 10 mg taken up to three times daily; some clinicians may increase to 20 mg per dose, not exceeding 30 mg per day.
Special populations:
Elderly or patients with hepatic impairment: Start at the lowest effective dose (10 mg once daily) and titrate cautiously.
Renal dysfunction: No specific dose reduction is required, but monitor for accumulation if severe.
Administration: Swallow the tablet whole; do not crush or chew. Store at room temperature, away from moisture and direct sunlight.
Missed dose: Take it as soon as you remember if it is at least 4 hours before the next scheduled dose. Do not double the dose.
Overdose: Signs may include severe dizziness, heart palpitations, or fainting. Seek emergency medical attention; treatment is supportive, and monitored cardiac observation is recommended.
Discontinuation: No tapering is required for short-term use. For chronic therapy, discuss any planned discontinuation with a healthcare professional to assess symptom recurrence.
This article provides educational information about Motilium and is not a substitute for professional medical advice. Treatment decisions, including use 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.
Motilium improves lower-esophageal sphincter tone, which may modestly reduce reflux episodes, but it is not an approved therapy for gastro-oesophageal reflux disease (GERD). Patients with reflux should discuss appropriate treatment options with their provider.
Take the missed dose as soon as you remember, provided there is at least a 4-hour gap before the next scheduled dose. Otherwise, skip the missed dose and resume the regular schedule to avoid accidental double-dosing.
Both contain the same active ingredient (domperidone) and are bioequivalent when manufactured according to regulatory standards. In Hong Kong, the brand name Motilium may be prescribed for consistency, but generic versions are therapeutically interchangeable.
Domperidone does not directly affect sodium balance. However, patients with severe cardiac conditions often follow low-sodium diets; they should continue their dietary plan while taking the medication.
Weight changes are not a typical effect of domperidone. Any perceived weight gain is more likely due to improved appetite or fluid retention linked to underlying conditions rather than the medication itself.
Patients usually experience relief within 30 minutes, with the full anti-emetic effect appearing within 1-2 hours after the first dose.
Patients with known cardiac arrhythmias, QT prolongation, or recent myocardial infarction should avoid Motilium unless a thorough cardiac assessment (including ECG) confirms safety.
Antacids do not significantly affect domperidone absorption. They can be taken together, but spacing them at least 30 minutes apart may improve tolerability of each product.
Typical excipients include lactose monohydrate, microcrystalline cellulose, magnesium stearate, and povidone. Patients with specific allergies should verify the full ingredient list on the packaging.
Domperidone is not commonly included in routine occupational or sports drug screens. However, specialized assays can detect it if specifically requested.
