Robidom SR Tablets 30’s

What Is ROBIDOM SR?

Robidom SR is a dual-action gastric medicine combining two complementary agents in a single sustained-release capsule.

Rabeprazole Sodium is a proton pump inhibitor (PPI), one of the most effective medicines for reducing stomach acid production by irreversibly blocking the proton pumps (H+/K+ ATPase) in the stomach lining's acid-secreting cells. This powerfully reduces the volume and acidity of stomach acid, allowing irritated or ulcerated areas of the oesophagus and stomach to heal.

Domperidone 30mg (in its sustained-release form) is a dopamine D2 receptor antagonist that works as a prokinetic, speeding up the movement of food from the stomach into the small intestine, and as an anti-emetic, reducing nausea and the urge to vomit by blocking dopamine receptors in the chemoreceptor trigger zone.

The sustained-release formulation of Domperidone ensures steady release over the day, providing consistent prokinetic and anti-nausea activity with once-daily dosing.

Together, Rabeprazole and Domperidone address upper GI disorders from two complementary directions, reducing harmful acid secretion while also improving gastric emptying and reducing nausea.

What Is It Used For?

Robidom SR is prescribed for adults with upper gastrointestinal conditions where both acid suppression and improved stomach motility are needed simultaneously. Its most important use is in gastro-oesophageal reflux disease (GORD) with delayed gastric emptying, a very common combination where acid reflux (heartburn, regurgitation) is worsened by a stomach that empties too slowly, and where a PPI alone does not fully control symptoms.

Robidom SR is also used for functional dyspepsia (persistent upper abdominal discomfort, bloating, and nausea without a structural cause), peptic ulcer disease where nausea is a prominent symptom, diabetic gastroparesis with acid-related symptoms, and nausea and bloating associated with H. pylori eradication therapy or other medicines that irritate the stomach.

In Kenya, upper GI complaints, reflux, dyspepsia, and nausea are among the most common presentations to pharmacies and clinics, and Robidom SR provides an elegant dual-mechanism approach that addresses both the acid excess and the motility problem that so often co-exist.

Usual Dose

1 capsule once daily, taken 30–60 minutes BEFORE breakfast for optimal acid suppression from the Rabeprazole component.

Before Meal

Rabeprazole must be taken before eating; proton pumps are most active when stimulated by food, so taking the PPI before a meal maximises its effect on acid suppression.

Swallow Whole

Swallow the SR capsule whole with water; do not crush, chew, or open it. The sustained-release mechanism requires the capsule to remain intact.

Duration

Use for the prescribed duration, typically 4–8 weeks for GORD or peptic ulcer healing. Long-term use requires periodic medical review.

Missed Dose

Take as soon as remembered if you have not yet eaten breakfast. If you have already eaten your main morning meal and some time has passed, skip the missed dose and take the next one before the following day's breakfast.

Do Not Stop Abruptly Long-Term

If on long-term PPI therapy, stopping suddenly can cause acid rebound, a temporary increase in acid production. Discuss tapering with your doctor.

Common Side Effects

·       Headache

·       Nausea (usually mild)

·       Diarrhoea or constipation

·       Abdominal pain or flatulence

·       Dry mouth (Domperidone)

Uncommon Side Effects

·       Breast tenderness or enlargement (gynaecomastia in men, Domperidone raises prolactin)

·       Galactorrhoea (unexpected milk production, Domperidone)

·       Elevated liver enzymes (Rabeprazole)

·       Skin rash

·       Dizziness

Serious Side Effects, Seek Immediate Medical Attention

·       QT prolongation and risk of life-threatening cardiac arrhythmia (Domperidone, most critical safety risk; dose-related and potentiated by CYP3A4 inhibitors and other QT-prolonging drugs)

·       Hypomagnesaemia (low magnesium) with long-term PPI use, can cause muscle cramps, cardiac arrhythmia, and tetany

·       Clostridium difficile colitis, long-term PPI use increases susceptibility

·       Vitamin B12 deficiency with prolonged PPI therapy, reduced acid impairs B12 absorption

·       Bone fractures, long-term high-dose PPI use associated with reduced bone mineral density

·       Acute interstitial nephritis (rare, Rabeprazole class effect)

·       QT PROLONGATION, DOMPERIDONE CARDIAC RISK: This is the most critical safety concern with Robidom SR. Domperidone prolongs the QT interval, increasing the risk of serious and potentially fatal ventricular arrhythmia. The risk is highest at doses above 30mg/day, in elderly patients, in those with hypokalaemia or hypomagnesaemia, and when combined with other QT-prolonging drugs or strong CYP3A4 inhibitors. Use the lowest effective dose for the shortest time.

·       SCREEN FOR QT-PROLONGING CO-MEDICATIONS: Before dispensing Robidom SR, check the patient's full medication list for concurrent QT-prolonging drugs; azithromycin, clarithromycin, haloperidol, chloroquine, and amiodarone are all common in Kenya and represent serious interactions.

·       CYP3A4 INHIBITORS: Azole antifungals (ketoconazole, itraconazole) and HIV antiretrovirals (ritonavir) are contraindicated with Domperidone; they dramatically increase Domperidone plasma levels and arrhythmia risk.

·       LONG-TERM PPI USE: Prolonged Rabeprazole use can cause hypomagnesaemia, B12 deficiency, and increased fracture risk. Monitor magnesium and B12 levels annually in patients on long-term PPI therapy.

·       PROLACTIN ELEVATION: Domperidone raises prolactin levels, may cause breast tenderness, gynaecomastia (in men), or unintended milk production. Report to doctor if these occur.

·       MAXIMUM 30mg DOMPERIDONE DAILY: Do not exceed this dose; higher doses increase cardiac risk disproportionately.

·       ACID REBOUND: Long-term PPI use suppresses acid production, stopping abruptly can cause a temporary rebound increase in acid. Taper under medical guidance.

QT-prolonging drugs (azithromycin, clarithromycin, haloperidol, amiodarone, chloroquine, ciprofloxacin, methadone): AVOID, additive QT prolongation with Domperidone, risk of fatal arrhythmia.

Strong CYP3A4 inhibitors (ketoconazole, itraconazole, ritonavir, voriconazole): CONTRAINDICATED, markedly increase Domperidone plasma levels.

Moderate CYP3A4 inhibitors (erythromycin, fluconazole, diltiazem, verapamil): Increase Domperidone exposure; use with caution, maximum 30mg/day Domperidone.

Anticholinergic drugs: Counteract Domperidone's prokinetic effect; avoid concurrent use.

Atazanavir, Nelfinavir (HIV antiretrovirals): Require acid for absorption; Rabeprazole reduces their bioavailability significantly.

Methotrexate: Rabeprazole may increase Methotrexate levels; monitor for toxicity.

Digoxin: Rabeprazole may increase Digoxin absorption.

Warfarin: Monitor INR, PPI therapy can modestly affect warfarin metabolism.

Clopidogrel: Rabeprazole has less interaction with clopidogrel than Omeprazole, generally considered the safer PPI to combine with clopidogrel.

Bromocriptine / Cabergoline (dopamine agonists): Domperidone (dopamine antagonist) counteracts these, avoid combination.

·       Store below 25°C in a cool, dry place.

·       Protect from moisture and light.

·       Keep in original blister packaging.

·       Keep out of reach of children.

Robidom SR is available in Kenya with a pharmacist recommendation or doctor's prescription. Given the significant cardiac safety concerns of the Domperidone component, a prescription from a physician and cardiac risk screening are strongly recommended before use. Available at Pharmily.

Robidom SR (Rabeprazole 20mg + Domperidone 30mg SR) is a PPI-prokinetic combination, a rational formulation for upper GI disorders where both acid excess and delayed gastric emptying co-exist.

The Rabeprazole component is a significant addition that changes the clinical profile, indications, and interaction landscape. Staff and patients must be aware of this distinction. The QT prolongation risk from Domperidone remains the primary pharmacovigilance priority, screen the complete medication list for QT-prolonging drugs at every dispensing. In Kenya, this is especially important given the frequent use of azithromycin (very common antibiotic), clarithromycin (H. pylori treatment), chloroquine (malaria), and haloperidol (psychiatric use).

The CYP3A4 inhibitor interaction is absolute for Domperidone, ketoconazole, itraconazole, and ritonavir are contraindicated. Fluconazole and erythromycin require caution and dose cap at 30mg Domperidone/day.

Clopidogrel patients: Rabeprazole is the preferred PPI for patients on clopidogrel, it has less CYP2C19 inhibitory activity than Omeprazole or Esomeprazole, preserving clopidogrel's antiplatelet effect. HIV antiretrovirals: Atazanavir requires gastric acid for absorption, Rabeprazole (and any PPI) significantly reduces atazanavir levels.

Coordinate with the HIV team before dispensing. Long-term PPI monitoring: Hypomagnesaemia, B12 deficiency, and bone mineral density are clinically important long-term risks, document and advise annual monitoring for patients on prolonged therapy.

Q1: What is Robidom SR used for?

A: Robidom SR is used for upper stomach problems where both too much acid AND a slow-emptying stomach are causing symptoms. It combines Rabeprazole (which reduces stomach acid) and Domperidone (which helps the stomach empty faster and reduces nausea) in a single once-daily capsule.

Q2: Why must I take Robidom SR before breakfast?

A: The Rabeprazole (acid-reducing) component works best when the acid-producing pumps in the stomach are most active, which happens when food is eaten. Taking it 30–60 minutes before eating ensures the medicine is in place and active exactly when stomach acid production peaks.

Q3: Can I take Robidom SR with azithromycin (an antibiotic)?

A: No, azithromycin combined with Domperidone in Robidom SR significantly increases the risk of a dangerous heart rhythm problem called QT prolongation. Always tell your doctor or pharmacist ALL medicines you are taking before starting Robidom SR.

Q4: Why does Robidom SR cause breast tenderness or milk production?

A: Domperidone in Robidom SR raises the level of the hormone prolactin, which stimulates breast tissue. This can cause breast tenderness, breast enlargement in men (gynaecomastia), or unexpected milk production in women. Tell your doctor if this happens.

Q5: How is Robidom SR different from a plain antacid?

A: Antacids (like calcium carbonate tablets) neutralise acid that has already formed, providing quick but brief relief. Rabeprazole in Robidom SR blocks the acid-producing pumps entirely, preventing acid from being produced in the first place, providing sustained, all-day relief with a single dose. It is far more powerful and longer-acting than antacids.