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Rabeprazole – Uses, Effects & Side Effects

Rabeprazole is a proton pump inhibitor (PPI) used to reduce stomach acid production in conditions such as acid reflux, gastric ulcers, and GERD.

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Things worth knowing about "Rabeprazole"

Rabeprazole is a proton pump inhibitor (PPI) used to reduce stomach acid production in conditions such as acid reflux, gastric ulcers, and GERD.

What is Rabeprazole?

Rabeprazole is a prescription medication belonging to the class of proton pump inhibitors (PPIs). It works by significantly reducing the production of stomach acid. Rabeprazole is available under various brand names and is one of the most commonly prescribed medications in gastroenterology worldwide.

Indications

Rabeprazole is used to treat a range of acid-related gastrointestinal conditions:

Gastroesophageal reflux disease (GERD): A chronic condition where stomach acid flows back into the esophagus, causing heartburn and discomfort
Erosive esophagitis: Inflammation and damage to the esophageal lining caused by stomach acid
Gastric ulcers (stomach ulcers) and duodenal ulcers
Helicobacter pylori eradication: Used in combination with antibiotics to eliminate the stomach-damaging bacterium Helicobacter pylori
Zollinger-Ellison syndrome: A rare condition involving excessive stomach acid production due to a hormone-secreting tumor

Mechanism of Action

Rabeprazole selectively and irreversibly inhibits the proton pump (H+/K+-ATPase) located in the parietal cells of the gastric mucosa. This enzyme is the final step in stomach acid secretion. By blocking this pump, the release of hydrochloric acid (HCl) into the stomach is substantially reduced, regardless of the initial stimulus (e.g., food intake, stress hormones).

Rabeprazole is taken as an inactive prodrug and is converted to its active form only in the acidic environment of the parietal cells. Its onset of action is relatively rapid, and the effect lasts for up to 24 hours.

Dosage and Administration

The dosage of rabeprazole depends on the condition being treated and should always be determined by a physician:

GERD and erosive esophagitis: Typically 20 mg once daily, taken in the morning before breakfast
Gastric or duodenal ulcers: 20 mg once daily for 4 to 8 weeks
Helicobacter pylori eradication: 20 mg twice daily combined with two antibiotics for 7 days
Zollinger-Ellison syndrome: Higher doses may be required, individually adjusted

Tablets should be swallowed whole and must not be chewed or crushed, as they have an enteric coating that protects the active ingredient from premature breakdown in the stomach.

Side Effects

Rabeprazole is generally well tolerated. Possible side effects include:

Common: Headache, diarrhea, nausea, abdominal pain, flatulence
Uncommon: Dizziness, sleep disturbances, dry mouth, skin rash
Rare: Elevated liver enzymes, joint pain, muscle pain
Very rare: Severe allergic reactions, blood count changes, interstitial nephritis (kidney inflammation)

Long-term use (more than one year) may increase the risk of magnesium deficiency, vitamin B12 deficiency, and bone loss (osteoporosis). Regular medical monitoring is therefore advisable during prolonged therapy.

Drug Interactions

Rabeprazole may interact with other medications:

Ketoconazole and itraconazole (antifungals): Reduced absorption due to elevated gastric pH
Methotrexate: Possible increase in blood levels, raising the risk of side effects
Clopidogrel: Possible reduction in the antiplatelet effect of clopidogrel
Digoxin: Increased absorption possible

Contraindications and Precautions

Rabeprazole should not be used in cases of:

Known hypersensitivity to rabeprazole or other proton pump inhibitors
Severe hepatic impairment (use only after careful benefit-risk assessment)

During pregnancy and breastfeeding, rabeprazole should only be taken after consulting a physician, as data on safety in these populations are limited.

References

European Medicines Agency (EMA): Summary of Product Characteristics for Rabeprazole, current version. www.ema.europa.eu
Loscalzo J, Fauci A, Kasper D et al. (eds.): Harrison's Principles of Internal Medicine, 21st edition, McGraw-Hill, 2022.
Strand DS, Kim D, Peura DA: 25 Years of Proton Pump Inhibitors: A Comprehensive Review. Gut and Liver, 2017; 11(1): 27–37. doi: 10.5009/gnl15502

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