Ranitidine

Common use

Ranitidine is an H2 (histamine-2) receptor antagonist used to reduce stomach acid production. It is prescribed to treat gastric and duodenal ulcers, gastroesophageal reflux disease (GERD), Zollinger–Ellison syndrome, and heartburn. It works by blocking histamine receptors in the stomach lining, thereby decreasing acid secretion.

Dosage and direction

Ranitidine is available in tablet, capsule, and injectable forms. Typical adult oral doses are 150 mg twice daily or 300 mg once daily at bedtime, depending on the condition being treated. It can be taken with or without food but should be taken with water and at regular intervals for best results.

Precautions

Contraindications

Possible side effect

Common side effects include headache, constipation, diarrhea, and fatigue. Rare side effects include liver dysfunction, bradycardia, skin rashes, and confusion in elderly patients. Long-term use may alter vitamin B12 absorption.

Drug interaction

Ranitidine may reduce the absorption of medications that require an acidic environment, such as ketoconazole or itraconazole. It can also interact with warfarin, glipizide, and midazolam. Always tell your doctor about any medications or supplements you are using.

Missed dose

Overdose

Storage

Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.