Omisan D 10mg/20mg Capsule

Omisan D 10mg/20mg Capsule provides dual therapeutic action against common upper gastrointestinal conditions such as persistent acidity, heartburn, and gastrointestinal motility issues. The combination of Omeprazole and Domperidone offers superior relief compared to using an acid blocker alone, particularly in patients who experience delayed gastric emptying or GERD refractory to monotherapy.

Omeprazole is a powerful Proton Pump Inhibitor (PPI). It suppresses the stomach’s capacity to produce acid by targeting the acid-secreting pumps in the stomach lining. This sustained acid reduction promotes the healing of ulcers and damaged oesophageal tissue. Simultaneously, Domperidone, a prokinetic and antiemetic drug, enhances the natural muscular contractions of the upper digestive tract. This action speeds up the downward movement of food, reducing bloating and the pressure that forces stomach contents back into the oesophagus. Furthermore, Domperidone’s antiemetic properties help to control associated symptoms like nausea and vomiting. By combining these two mechanisms, acid suppression and enhanced motility, Omisan D 10mg/20mg Capsule not only treats the symptoms but also addresses the underlying causes of acid reflux and indigestion.

Omisan D 10mg/20mg Capsule is indicated for the treatment of:

Gastroesophageal Reflux Disease (GERD):

Including erosive esophagitis, to heal the damage caused by acid reflux and relieve symptoms like heartburn.

Non-Ulcer Dyspepsia (Functional Dyspepsia):

To relieve symptoms of fullness, bloating

Peptic Ulcer Disease:

Used in combination with antibiotics (H. pylori eradication therapy) or alone to heal and prevent recurrence of stomach and duodenal ulcers.

Conditions where acid secretion and impaired gut motility coexist.

The combination of Omeprazole and Domperidone offers synergistic benefits:

Complete Symptom Control:

Omeprazole provides powerful acid suppression (treating the root cause), while Domperidone manages motility-related symptoms like nausea, vomiting, and bloating (treating associated symptoms).

Enhanced Healing:

By maintaining a reduced acid environment, Omeprazole accelerates the healing of gastric and duodenal mucosal lesions.

Reduced Reflux: Domperidone's action on the lower oesophageal sphincter prevents acid and food contents from moving back into the oesophagus, significantly improving GERD symptoms.

While generally safe for short-term use, both components can cause side effects.

Common Side Effects

• These are generally mild and transient:

• Headache, dizziness

• Diarrhoea or constipation

• Flatulence (gas)

• Dry mouth

• Nausea (often resolves as the Domperidone starts working)

Critical Side Effects (Require Immediate Medical Attention)

• Cardiac Risks (Domperidone): Changes in heart rhythm (QT interval prolongation), palpitations, or fainting. Domperidone is used with caution due to the risk of serious cardiac side effects, especially at high doses or in patients with pre-existing heart conditions.

• Severe Allergic Reaction: Rash, itching, swelling of the face, lips, or tongue, and difficulty breathing.

• Liver Problems (Omeprazole): Yellowing of the eyes or skin (jaundice), dark urine, or abdominal pain.

• Long-Term Omeprazole Risks: If used for more than one year, Omeprazole may lead to vitamin B12 deficiency, low magnesium levels, and an increased risk of bone fractures (osteoporosis).

Always take Omisan D 10mg/20mg Capsule exactly as prescribed by your doctor.

• Administration: Swallow the capsule whole with a glass of water. Do not chew, crush, or open the capsule.

• Timing: For maximum efficacy, Omisan D 10mg/20mg Capsule must be taken on an empty stomach, ideally 15 to 30 minutes before the first meal of the day. This allows Omeprazole to be absorbed and reach the parietal cells before the food stimulates acid production.

• Duration: The usual course of treatment is 4 to 8 weeks, depending on the diagnosis. Do not use for longer periods than prescribed, especially due to Domperidone's cardiac safety profile.

Omisan D 10mg/20mg Capsule provides targeted action at two critical points in the digestive process:

1. Omeprazole (Acid Suppression): It is a prodrug that is activated in the acidic environment of the stomach’s parietal cells. It then binds irreversibly to the H+/K+-ATPase enzyme system (the Proton Pump), effectively shutting down the final step of acid secretion. This blockade provides up to 24 hours of acid suppression.
2. Domperidone (Prokinetic Action): It works in the digestive tract by blocking Dopamine D2 receptors. This action helps to:
3. Increase the tone and strength of the muscle contractions in the stomach.
4. Relax the pyloric sphincter.
5. Increase the pressure of the Lower Oesophageal Sphincter (LES).
6. This combined effect ensures less acid is produced and the existing gastric contents are rapidly moved downwards, reducing reflux and alleviating nausea.

• Timing is Key: Always take this capsule 15-30 minutes before your first meal for Omeprazole to be most effective.

• Do Not Stop Abruptly: Stopping PPIs (Omeprazole) suddenly can lead to rebound acid hypersecretion (increased acid production). Tapering the dose may be necessary if you are on long-term therapy.

• Report Cardiac Symptoms: Immediately report any episodes of fainting, dizziness, or palpitations, as these can be serious side effects of Domperidone.

• Long-Term Monitoring: If your doctor prescribes this for longer than 8 weeks, regular blood tests for Vitamin B12 and Magnesium levels may be necessary.

• Swallow Whole: Never crush or chew the capsule, as this destroys the enteric coating on the Omeprazole pellets, rendering the drug ineffective and potentially irritating the stomach.

• Store Omisan D 10mg/20mg Capsule at normal room temperature, typically below 30 °C.

• Keep the capsules in their original packaging, protected from moisture and direct sunlight.

• Do not use the capsules past the expiry date printed on the packaging.

• Keep this and all medications out of the reach of children and pets.

Food: Food intake severely decreases the bioavailability of Omeprazole, which is why it must be taken on an empty stomach. Grapefruit Juice: May interfere with the metabolism of Domperidone, potentially increasing its concentration and risk of side effects. Avoid consuming it with this medication.

Caution is required for patients with:

• Cardiac Conditions: CONTRAINDICATED in patients with a history of heart failure, recent heart attack, or known prolonged QTc interval due to the Domperidone component.

• Liver Disease: Severe hepatic impairment significantly reduces the clearance of both drugs, increasing the risk of toxicity.

• Gastrointestinal Bleeding/Obstruction: Domperidone's prokinetic action is contraindicated in conditions where stimulating motility might be harmful (e.g., GI haemorrhage, mechanical obstruction, or perforation).

The co-administration of Omisan D 10mg/20mg Capsule with certain drugs can be hazardous, particularly those that affect the QTc interval or the metabolism of Domperidone (via CYP3A4 inhibition).

Critical Contraindications (Due to Domperidone)

QTc Prolonging Drugs: Avoid combining with other medicines that prolong the QTc interval (e.g., certain anti-arrhythmics like Amiodarone, some antifungals like Ketoconazole, and some antibiotics like Erythromycin). This significantly increases the risk of serious cardiac arrhythmia.

CYP3A4 Inhibitors: Strong inhibitors of this liver enzyme (e.g., Ketoconazole, Ritonavir, Clarithromycin) must be avoided, as they dramatically increase Domperidone levels, leading to toxicity.

Interactions that Reduce Acid Suppression (Omeprazole)

Clopidogrel: Omeprazole reduces the effectiveness of this antiplatelet drug, increasing the risk of cardiovascular events. A non-interacting PPI (like Pantoprazole) is often preferred.

Interactions that Affect Other Medications

Iron Salts/Calcium Carbonate: Reduced stomach acid (from Omeprazole) decreases the absorption of these supplements. They should be taken separately.

The dose is determined based on the severity of the condition.

• Standard Adult Dose: One capsule (Omeprazole 20mg / Domperidone 10mg) taken once daily, 15 to 30 minutes before breakfast.

• Therapeutic Range: In some cases of severe GERD, a doctor may recommend a twice-daily dose (before breakfast and before dinner).

• Maximum Duration: Due to the cardiac risks associated with Domperidone, continuous use is generally limited to the shortest duration necessary, often 4 to 8 weeks.

An overdose may cause severe symptoms related to both components:

• Omeprazole: Likely to cause mild symptoms like headache, nausea, or flushing.

• Domperidone: More severe symptoms, including drowsiness, confusion, uncontrolled body movements (extrapyramidal symptoms), and potential severe cardiac events (arrhythmias).

• If overdose is suspected, seek immediate emergency medical attention. Treatment is supportive and focuses on managing symptoms, especially cardiac monitoring.

If you miss a dose, take it as soon as you remember. If it is already close to the time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for the missed one. If you remember after eating, take the missed dose and wait until the next day to resume the pre-meal timing.