Famotidine is a medication used to treat peptic ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome by reducing the amount of acid produced in the stomach [1]. In the United Kingdom, famotidine is available as a prescription-only medicine and also over-the-counter for short-term relief of heartburn and indigestion [2][3].
How does famotidine work?
Famotidine is a histamine H2-receptor antagonist. It works by blocking the action of histamine on parietal cells in the stomach lining, which in turn reduces the secretion of gastric acid [1].
What conditions is famotidine prescribed for?
Famotidine is prescribed for a range of acid-related gastrointestinal conditions. These include:
* Peptic ulcers, including duodenal and gastric ulcers [1].
* Gastroesophageal reflux disease (GERD), to relieve symptoms like heartburn and to heal esophageal damage [1].
* Zollinger-Ellison syndrome, a rare condition characterized by excessive stomach acid production [1].
Can I buy famotidine without a prescription in the UK?
Yes, in the UK, lower-strength famotidine formulations are available over-the-counter for the short-term symptomatic relief of heartburn and indigestion [2][3]. Higher strengths and specific indications require a prescription from a doctor [2].
What are the potential side effects of famotidine?
Common side effects of famotidine can include headache, dizziness, constipation, and diarrhea [4]. Less common side effects may involve rash, itching, or fatigue [4]. Patients should consult their doctor or pharmacist if they experience persistent or bothersome side effects [4].
Are there any drug interactions with famotidine?
Famotidine can interact with certain medications, primarily those whose absorption is dependent on stomach acidity. For example, it may decrease the absorption of ketoconazole and itraconazole [4]. It is important to inform a healthcare professional about all medications, including over-the-counter drugs and supplements, being taken before starting famotidine [4].
When does famotidine patent expire in the UK?
Famotidine is a well-established drug with expired patents. Its generic versions have been available for some time, contributing to its accessibility as both a prescription and over-the-counter medication [5].
What are the alternatives to famotidine for heartburn relief?
Alternatives to famotidine for heartburn relief include other H2-receptor antagonists like ranitidine (though its availability has been affected by recalls) and cimetidine. Proton pump inhibitors (PPIs) such as omeprazole and lansoprazole are also commonly used for more persistent or severe acid-related symptoms [6]. Antacids provide quick, short-term relief by neutralizing stomach acid [6].
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Sources:
[1] Drugs.com, Famotidine: Uses, Side Effects, Dosage, Interactions, Warning, MedicineNet.
[2] NHS, Famotidine.
[3] The Boots Company PLC, Famotidine 10mg Tablets.
[4] MedlinePlus, Famotidine.
[5] DrugPatentWatch.com, Famotidine.
[6] Mayo Clinic, Heartburn.