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DIPYRIDAMOLE AND H2-RECEPTOR ANTAGONISTS

Medical Diagnosis and Drugs, Medications
The effective disintegration, dissolution and eventual absorption of dipyridamole in tablet or suspension form depends upon having a low pH in the stomach. Drugs that significantly raise the gastric pH are expected to reduce the bioavailability of dipyridamole tablets. This effect has been seen with famotidine.
The clinical significance of this interaction is unknown. Bear it in mind if an H2- receptor antagonist is given with dipyridamole. Note that modified-release preparations of dipyridamole (that are buffered) do not appear to be affected.
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