Drug interactions
Dalfampridine + Metformin-sitagliptin
Severity: Moderate
Dalfampridine and Metformin-sitagliptin: 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
Both metformin and dalfampridine are eliminated by renal cation transport, so each may raise the other's exposure. Increased dalfampridine levels raise seizure risk, which matters especially in renal impairment.
What this interaction means in plain words
Dalfampridine and Metformin-sitagliptin 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.
Dalfampridine belongs to Central Nervous System; Metformin-sitagliptin belongs to Endocrine.
Why it happens
Competition for renal tubular secretion via OCT2.
What to do
Check renal function before combining and avoid dalfampridine if renal function is impaired. Monitor for seizures, and for metformin adverse effects.
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 Metformin-sitagliptin
Other interactions of Dalfampridine
Frequently asked questions
Can I take Dalfampridine with Metformin-sitagliptin?
MediHelp rates the interaction as moderate. Dalfampridine and Metformin-sitagliptin 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. Both metformin and dalfampridine are eliminated by renal cation transport, so each may raise the other's exposure. Increased dalfampridine levels raise seizure risk, which matters especially in renal impairment.
How serious is the interaction between Dalfampridine and Metformin-sitagliptin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check renal function before combining and avoid dalfampridine if renal function is impaired. Monitor for seizures, and for metformin adverse effects.
What other medicines interact with Metformin-sitagliptin?
MediHelp also lists interactions of Metformin-sitagliptin with, for example, Clozapine, Contrast media, Diatrizoate meglumine / diatrizoate. The full list is on the Metformin-sitagliptin page.
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