Drug interactions
Dapagliflozin-metformin + Topiramate
Severity: Moderate
Dapagliflozin-metformin and Topiramate: 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
Topiramate inhibits carbonic anhydrase and can cause hyperchloraemic non-anion gap metabolic acidosis. Combined with metformin, which carries a lactic acidosis risk, the acidosis may be worsened or harder to interpret. Topiramate may also modestly raise metformin exposure.
What this interaction means in plain words
Dapagliflozin-metformin and Topiramate 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.
Dapagliflozin-metformin belongs to Endocrine; Topiramate belongs to Central Nervous System.
Why it happens
Carbonic anhydrase inhibition lowers serum bicarbonate, and the resulting acidosis adds to metformin-associated lactic acidosis risk.
What to do
Measure serum bicarbonate at baseline and periodically. Consider stopping or reducing metformin or topiramate if persistent metabolic acidosis develops.
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 Dapagliflozin-metformin
Other interactions of Topiramate
Frequently asked questions
Can I take Dapagliflozin-metformin with Topiramate?
MediHelp rates the interaction as moderate. Dapagliflozin-metformin and Topiramate 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. Topiramate inhibits carbonic anhydrase and can cause hyperchloraemic non-anion gap metabolic acidosis. Combined with metformin, which carries a lactic acidosis risk, the acidosis may be worsened or harder to interpret. Topiramate may also modestly raise metformin exposure.
How serious is the interaction between Dapagliflozin-metformin and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Measure serum bicarbonate at baseline and periodically. Consider stopping or reducing metformin or topiramate if persistent metabolic acidosis develops.
What other medicines interact with Dapagliflozin-metformin?
MediHelp also lists interactions of Dapagliflozin-metformin with, for example, Contrast media, Diatrizoate, Diatrizoate meglumine / diatrizoate. The full list is on the Dapagliflozin-metformin page.
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