Cyra-D is a fixed-dose combination capsule containing rabeprazole sodium 20 mg and domperidone 30 mg (sustained release), widely prescribed in India for acid-related conditions. Rabeprazole is a proton pump inhibitor that is the most potent acid-suppressing drug class. Domperidone is a dopamine receptor antagonist acting on the upper digestive tract. Together they address excess acid production and sluggish stomach emptying that are the main causes of GERD. Cyra-D is a Schedule H prescription drug.

How Does Cyra-D Work

Rabeprazole sodium irreversibly blocks the proton pump (the hydrogen-potassium ATPase enzyme) on acid-secreting parietal cells. This is the final step in acid production. By shutting it down, rabeprazole reduces gastric acid output within hours. Acid secretion resumes only when new pumps are synthesised, approximately 24 hours later.

Domperidone (30 mg SR) blocks dopamine D2 receptors at the gastric junction, increasing lower oesophageal sphincter tone and speeding up gastric emptying. Less food sitting in the stomach means less acid available to reflux upward.

Uses of Cyra-D

Doctors prescribe Cyra-D for:

• Gastroesophageal reflux disease (GERD): Reduces acid production and backward flow of acid into the oesophagus

• Peptic ulcer disease: Heals gastric and duodenal ulcers in an acid-suppressed environment

• Non-ulcer dyspepsia: Relieves bloating, nausea, and upper abdominal discomfort without a structural ulcer

• Zollinger-Ellison syndrome: Rare excessive acid production requiring high-dose PPI therapy

• NSAID-associated gastropathy: Protects the stomach lining in patients taking ibuprofen, diclofenac, or aspirin regularly

• Nausea and delayed gastric emptying: Domperidone helps where slow stomach movement contributes to nausea and postprandial bloating.

How and When to Take Cyra-D

Cyra-D is taken once daily, 30 to 60 minutes before the first meal. Pre-meal dosing is critical as proton pumps are most active during a meal and rabeprazole must be circulating before that happens. Swallow the capsule whole; do not crush or chew.

The standard course is:

• For GERD: 4 to 8 weeks

• For peptic ulcers: 4 to 8 weeks

• For duodenal ulcers: 4 weeks 

• For gastric ulcers: 8 weeks. 

Do not stop mid-course because symptoms improve as sustained acid suppression is needed for complete mucosal healing.

Side Effects of Cyra-D

Most patients tolerate Cyra-D well. Side effects are generally mild and resolve without stopping the medicine.

• Headache and dizziness

• Dry mouth, nausea, and diarrhoea

• Flatulence and abdominal discomfort

• Galactorrhoea and gynaecomastia (rare domperidone effects)

• Prolonged QT interval.

Long-term PPI use beyond 12 weeks raises the risk of hypomagnesaemia, Clostridioides difficile diarrhoea, fracture and vitamin B12 deficiency.

Can I Take Cyra-D Daily?

Cyra-D is designed for once-daily use during a defined course. For GERD or peptic ulcers, 4 to 8 weeks is safe and appropriate. Beyond 12 weeks risks increase and continued use requires medical supervision.

Long-term domperidone carries a cardiac arrhythmia risk from QT interval prolongation. Guidelines recommend it at the lowest effective dose for the shortest period. If ongoing acid suppression is needed beyond the initial course, a PPI alone is usually preferred.

Precautions While Using Cyra-D

Tell your doctor about:

• Cardiac conditions: Inform your doctor of heart rhythm abnormalities, heart failure, or electrolyte imbalances as domperidone prolongs the QT interval and these heighten that risk

• Liver disease: Rabeprazole is hepatically metabolised; dose adjustment may be needed in moderate-to-severe impairment

• Kidney disease: Standard doses are generally safe; monitoring is advisable for prolonged use

• Elderly patients: More susceptible to QT prolongation and bone density loss from long-term PPI use

• Avoid alcohol: Increases acid secretion and irritates the gastric mucosa

• Driving: Dizziness is a reported side effect so exercise caution, particularly when starting treatment.

What If You Missed a Dose?

Take the missed dose as soon as you remember unless the next dose is within a few hours, in which case skip it. Never double the dose. Consistent daily pre-meal use maintains steady acid suppression.

What If You Overdose?

Overdose of Cyra-D can cause severe drowsiness, confusion, blurred vision, agitation, and potentially serious heart rhythm disturbances from domperidone. Seek emergency medical care immediately. 

Caution With Other Drugs: Interactions

Key interactions are:

• Antifungals like ketoconazole and itraconazole

• Atazanavir

• Clopidogrel

• Digoxin

• Erlotinib

• Methotrexate

• QT-prolonging drugs like erythromycin, clarithromycin, fluconazole, amiodarone

•  and haloperidol

• Warfarin.

Dosage for Cyra-D

The standard adult dose is one Cyra-D capsule once daily, 30 to 60 minutes before breakfast. This applies to GERD, non-ulcer dyspepsia, and NSAID gastropathy. For peptic ulcer disease, the same dose runs for 4 to 8 weeks.

Cyra-D is not recommended for children without specialist guidance as domperidone carries cardiac risk in younger patients. 

Cyra-D vs Pan-D

Pan-D contains pantoprazole 40 mg + domperidone 30 mg SR whereas Cyra-D contains rabeprazole sodium 20 mg + domperidone 30 mg SR. Key differences are:

• Acid suppression: Rabeprazole reaches therapeutic acid suppression slightly faster than pantoprazole and has a lower clopidogrel interaction risk.

• Onset of action: Both contain domperidone 30 mg SR; rabeprazole has a faster onset and a lower CYP2C19 interaction risk

• Drug interactions: Cyra-D generally has fewer drug interactions than pantoprazole

• Uses: Both are used for GERD (acid reflux), heartburn, gastritis, and indigestion associated with nausea or bloating.

Both medicines are effective for acid reflux and indigestion. The choice depends on the patient's symptoms and medical history.

When to Consult a Doctor

Consult a doctor before starting Cyra-D if you have heart disease, liver problems or take medicines affecting heart rhythm. Seek advice if: 

• Symptoms do not improve within 2 weeks

• Heartburn returns immediately after stopping

• You develop unexplained weight loss, difficulty swallowing, black or tarry stools or persistent vomiting. 

• You experience palpitations, dizziness, or fainting while on Cyra-D.

FAQs

1. What is Cyra-D capsule used for?

   Cyra-D treats GERD, peptic ulcer disease, non-ulcer dyspepsia,and stomach irritation from long-term NSAID use. Rabeprazole reduces acid production & domperidone improves stomach emptying and reduces nausea.

2. How does Cyra-D help with acidity and GERD?

   Rabeprazole blocks the proton pump reducing acid output. Domperidone tightens the lower oesophageal sphincter and speeds up stomach emptying, reducing acid available to reflux. Together they address both the production and mechanical drivers of acid reflux.

3. What are the side effects of Cyra-D capsule?

   Common effects are:

   • Headache

   • Dry mouth

   • Nausea

   • Diarrhoea

   • Flatulence. 

   Prolonged domperidone use may cause galactorrhoea or gynaecomastia from prolactin elevation. The most serious concern is QT interval prolongation from domperidone, increasing arrhythmia risk in patients with heart conditions.

4. When should the Cyra-D capsule be taken?

   Once daily, 30 to 60 minutes before the first meal. Proton pumps are most active when stimulated by food and rabeprazole must be circulating before that happens. Post-meal dosing significantly reduces effectiveness. Swallow the capsule whole.

5. Can Cyra-D treat acid reflux and heartburn?

   Yes. Rabeprazole reduces acid and domperidone reduces mechanical reflux by improving stomach clearance. Most patients notice improvement within 2 to 3 days, with full benefit at 4 weeks.

6. Is Cyra-D safe for long-term use?

   Courses of 4 to 8 weeks are safe. Beyond 12 weeks the risk of hypomagnesaemia, vitamin B12 deficiency, fracture, and cardiac QT prolongation from domperidone increases. 

7. Can Cyra-D be taken on an empty stomach?

   Taking it before a meal is the recommended approach. Rabeprazole needs to reach peak plasma levels before proton pumps are activated by eating. Post-meal dosing significantly reduces its acid-suppressing effect.

8. What precautions should be taken while using Cyra-D?

   Patients with heart conditions, liver disease or those on QT-prolonging drugs should inform their doctor first. Avoid alcohol. Take the capsule whole. Unexplained weight loss, swallowing difficulty or blood in stools require investigation.

9. Can Cyra-D interact with other medicines?

   Key interactions: clopidogrel (reduced antiplatelet effect), ketoconazole and itraconazole (reduced absorption), digoxin (increased blood levels), and QT-prolonging drugs such as erythromycin or fluconazole (combined cardiac risk with domperidone). Always inform your doctor of all current medications.

10. Is Cyra-D safe during pregnancy?

    Neither rabeprazole nor domperidone is recommended in pregnancy. Rabeprazole is a Pregnancy Category B drug. Domperidone passes into breast milk and is avoided during breastfeeding. Antacids or low-dose ranitidine under obstetric guidance are safer alternatives.