

Address Note 16, 261 St 261, Phnom Penh, Cambodia
Cimetidine 400mg
No prescription required
This medicine is available over the counter. Still, please consult your doctor or pharmacist before using new medication.
Last updated 24/05/2026 at 2:11 AM

Address Note 16, 261 St 261, Phnom Penh, Cambodia
Indication
Cimetidine is an H2-receptor antagonist used to treat peptic ulcer disease, gastroesophageal reflux disease (GERD), and conditions causing excess stomach acid secretion such as Zollinger-Ellison syndrome. It reduces gastric acid production.
Ingredients
- Cimetidine 400 mg
Direction
Adults: 400 mg twice daily (morning and evening) or 800 mg at bedtime. For maintenance, 400 mg at bedtime. Doses should be taken with or after food. Duration as directed by a physician.
Side effects
- Diarrhea
- dizziness
- or headache.
- Gynecomastia or impotence with prolonged use.
- Rare: confusional state (especially in elderly)
- drug interactions.
Precautions
- Use with caution in patients with renal or hepatic impairment
- dose adjustment may be needed.
- May interact with many drugs including warfarin
- phenytoin
- and theophylline.
- May increase blood prolactin levels
- long
- term use can cause gynaecomastia.
- Consult a doctor if symptoms persist.
- Keep out of reach of children.
Indication
Cimetidine is an H2-receptor antagonist used to treat peptic ulcer disease, gastroesophageal reflux disease (GERD), and conditions causing excess stomach acid secretion such as Zollinger-Ellison syndrome. It reduces gastric acid production.
Ingredients
- Cimetidine 400 mg
Direction
Adults: 400 mg twice daily (morning and evening) or 800 mg at bedtime. For maintenance, 400 mg at bedtime. Doses should be taken with or after food. Duration as directed by a physician.
Side effects
- Diarrhea
- dizziness
- or headache.
- Gynecomastia or impotence with prolonged use.
- Rare: confusional state (especially in elderly)
- drug interactions.
Precautions
- Use with caution in patients with renal or hepatic impairment
- dose adjustment may be needed.
- May interact with many drugs including warfarin
- phenytoin
- and theophylline.
- May increase blood prolactin levels
- long
- term use can cause gynaecomastia.
- Consult a doctor if symptoms persist.
- Keep out of reach of children.
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