JD RAB-DSR - Complete Medicine Description

What Is This Medicine?

JD RAB-DSR is a combination prescription capsule containing two active drugs: Rabeprazole Sodium and Domperidone. It is a Schedule H drug in India, meaning it can only be sold with a registered doctor's prescription.

Composition (Per Capsule)

Component	Dose	Formulation Type
Rabeprazole Sodium I.P.	20 mg	Enteric Coated (E.C.) pellets
Domperidone I.P.	30 mg	Sustained Release (S.R.) pellets
Excipients	Q.S.	(as needed)

The capsule must be swallowed whole - it should never be opened, chewed, or crushed, because breaking it would destroy both the enteric coating and the sustained release mechanism.

Component 1: Rabeprazole Sodium 20 mg

Drug Class

Proton Pump Inhibitor (PPI)

Mechanism of Action

Rabeprazole is a prodrug that gets activated in the acidic environment of the parietal cell canaliculi. Once activated, it irreversibly binds to and inhibits the H⁺/K⁺-ATPase (proton pump) on the gastric parietal cell, blocking the final step of acid secretion. This reduces daily acid production (basal and stimulated) by 80-95%. - Goodman & Gilman's, p. 1094

The enteric-coated pellet formulation protects the drug from stomach acid degradation and ensures it dissolves only at the alkaline pH of the small intestine, improving bioavailability. It is best taken 30 minutes before the first meal of the day.

Key Pharmacokinetic Notes

Metabolized by hepatic CYP2C19 and CYP3A4
Rabeprazole has less CYP2C19 dependence than other PPIs (e.g., omeprazole), making it more consistent across different genetic types - Yamada's Textbook of Gastroenterology, p. 437
Dose should be reduced in severe liver impairment

Uses of Rabeprazole

Gastroesophageal reflux disease (GERD) / acid reflux
Peptic ulcer disease (gastric and duodenal ulcers)
H. pylori eradication (as part of triple therapy)
NSAID-induced ulcer treatment and prevention
Zollinger-Ellison syndrome (hypersecretory conditions)

Component 2: Domperidone 30 mg

Drug Class

Dopamine D2-receptor antagonist / Prokinetic agent

Mechanism of Action

Domperidone selectively antagonizes D2 dopamine receptors, predominantly in the gastrointestinal tract. This promotes coordinated gastric contractions, increases lower esophageal sphincter tone, and speeds gastric emptying. Unlike metoclopramide, domperidone does not readily cross the blood-brain barrier, so it causes far fewer neurological (extrapyramidal) side effects. - Goodman & Gilman's, p. 1107

It exerts its antiemetic effect by acting on the chemoreceptor trigger zone (CTZ) in the area postrema, which lacks the blood-brain barrier.

The sustained release (S.R.) formulation ensures a steady, prolonged effect throughout the day.

Uses of Domperidone

Nausea and vomiting
Gastroparesis (delayed gastric emptying, especially in diabetics)
Bloating, abdominal discomfort, and fullness after meals
Gastric dysmotility syndromes
Sometimes used to stimulate postpartum lactation (off-label)

Why Are These Two Drugs Combined?

This is a logical and very common combination for upper GI disorders:

Rabeprazole suppresses excess acid production
Domperidone improves stomach motility and prevents reflux/nausea

Together, they address both the acid component and the motility component of conditions like GERD, gastritis, and dyspepsia - providing faster and more complete symptom relief than either drug alone.

Main Clinical Uses of JD RAB-DSR

GERD (Gastroesophageal Reflux Disease) - heartburn, regurgitation
Gastritis - inflammation of the stomach lining
Peptic ulcers - gastric or duodenal
Functional dyspepsia - bloating, nausea, early satiety
Gastroparesis - delayed stomach emptying
Nausea and vomiting associated with GI conditions

Important Warnings & Side Effects

Concern	Details
Cardiac risk	Domperidone can prolong the QT interval, increasing the risk of serious ventricular arrhythmias, especially in patients over 60 years or at doses above 30 mg/day - Goodman & Gilman's
Hormonal effects	Both drugs together can elevate prolactin levels, causing galactorrhea (milk discharge), gynecomastia, or menstrual irregularities
Kidney caution	Packaging partially warns about kidney-related adverse effects
Drug interactions	Rabeprazole can interact with warfarin, clopidogrel (preferred PPI when on clopidogrel), diazepam, and antiretroviral drugs
Rebound acid	Stopping PPIs after long-term use can cause rebound acid hypersecretion and dyspepsia

Packaging Details (from the strip)

Manufacturer: Hetvi Lifesciences Pvt. Ltd. (WHO-GMP Certified), Ahmedabad
Marketed by: JD Medilink, Ahmedabad
Batch No.: CF09007A | Mfg. Date: Sept 2025 | Expiry: Aug 2027
MRP: Rs. 99.00 for 10 capsules (inclusive of all taxes)
Storage: Cool, dry place; protect from light and moisture; keep out of children's reach

Reminder: This is a Schedule H prescription medicine. Always take it under medical supervision and do not self-medicate or alter the dose without consulting your doctor.

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