Drug interactions
Famotidine + Risedronate
Severity: Moderate
Famotidine and Risedronate: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Delayed-release risedronate has a pH-sensitive coating, and higher gastric pH can cause earlier release and greater exposure. This may increase upper GI irritation, though effects are usually modest.
What this interaction means in plain words
Famotidine and Risedronate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Famotidine belongs to Gastrointestinal Tract; Risedronate belongs to Musculoskeletal.
Why it happens
Elevated gastric pH accelerates dissolution of the delayed-release risedronate coating.
What to do
Use immediate-release risedronate in patients needing acid suppression and monitor for upper GI symptoms.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Famotidine
Other interactions of Risedronate
- Aluminum hydroxide + Risedronate Moderate
- Calcium acetate + Risedronate Moderate
- Calcium carbonate + Risedronate Moderate
- Calcium chloride + Risedronate Moderate
- Calcium citrate + Risedronate Moderate
- Calcium gluconate + Risedronate Moderate
Frequently asked questions
Can I take Famotidine with Risedronate?
MediHelp rates the interaction as moderate. Famotidine and Risedronate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Delayed-release risedronate has a pH-sensitive coating, and higher gastric pH can cause earlier release and greater exposure. This may increase upper GI irritation, though effects are usually modest.
How serious is the interaction between Famotidine and Risedronate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use immediate-release risedronate in patients needing acid suppression and monitor for upper GI symptoms.
What other medicines interact with Famotidine?
MediHelp also lists interactions of Famotidine with, for example, Atazanavir, Dasatinib, Infigratinib. The full list is on the Famotidine page.
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