Drug interactions
Flecainide + Sodium lactate
Severity: Moderate
Flecainide and Sodium lactate: 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
Lactate is metabolized to bicarbonate and may alkalinize the urine, decreasing flecainide elimination. The effect is probably modest with usual infusion volumes but could matter in large or repeated doses.
What this interaction means in plain words
Flecainide and Sodium lactate 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.
Why it happens
Metabolic alkalosis and urinary alkalinization increase passive tubular reabsorption of flecainide.
What to do
Monitor ECG intervals and flecainide levels if large or prolonged sodium lactate infusions are given. Adjust flecainide dose if toxicity 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 Flecainide
- Flecainide + Nirmatrelvir Contraindicated
- Flecainide + Nirmatrelvir / ritonavir Contraindicated
- Flecainide + Pimozide Contraindicated
- Flecainide + Ritonavir Contraindicated
- Flecainide + Thioridazine Contraindicated
- Flecainide + Tipranavir Contraindicated
Frequently asked questions
Can I take Flecainide with Sodium lactate?
MediHelp rates the interaction as moderate. Flecainide and Sodium lactate 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. Lactate is metabolized to bicarbonate and may alkalinize the urine, decreasing flecainide elimination. The effect is probably modest with usual infusion volumes but could matter in large or repeated doses.
How serious is the interaction between Flecainide and Sodium lactate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor ECG intervals and flecainide levels if large or prolonged sodium lactate infusions are given. Adjust flecainide dose if toxicity develops.
What other medicines interact with Flecainide?
MediHelp also lists interactions of Flecainide with, for example, Nirmatrelvir, Nirmatrelvir / ritonavir, Pimozide. The full list is on the Flecainide page.
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