Famotidine
Prescription status is set country by country — the label where you live is the one that applies.
Beta: the medication section is still being tested, and its data may contain errors. Do not rely on it for a decision about your own treatment.
Famotidine is an H2 blocker: it blocks histamine receptors on the acid-secreting cells of the stomach, so less acid is produced. The effect is milder and shorter than that of a proton pump inhibitor but comes on quickly. It is used for heartburn and acid-related stomach discomfort.
A usual adult range, not a national label — the dose and the timing differ by country and by product.
Approved uses differ by country — some of these may be off-label or unapproved where you live.
It can be taken with or without food, and it is often used ahead of a meal or at bedtime, when acid-related symptoms tend to appear. Because it lowers stomach acid, it can interfere with the release of vitamin B12 from food, which matters mainly with prolonged use. Reduced acid can likewise blunt the absorption of drugs and supplements that need an acid stomach, so spacing them apart is sensible.
Heartburn that does not settle, returns as soon as treatment stops, or comes with trouble swallowing, vomiting, black stools or weight loss should be seen by a doctor.
Reference information, not medical advice. Discuss any change with your doctor.