Drug interactions
Aspirin rectal + Valproic acid
Severity: Moderate
Aspirin rectal and Valproic acid: 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
Systemically absorbed aspirin displaces valproate from albumin and may inhibit its metabolism, increasing free valproate levels. Additive effects on platelet function also raise bleeding risk.
What this interaction means in plain words
Aspirin rectal and Valproic acid 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
Displacement of valproate from plasma protein binding and reduced valproate metabolism, with additive antiplatelet effects.
What to do
Monitor free valproate concentration and for toxicity or bleeding with regular salicylate use. Prefer paracetamol for analgesia or antipyresis where suitable.
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 Valproic acid
- Ertapenem + Valproic acid Contraindicated
- Imipenem / cilastatin / relebactam + Valproic acid Contraindicated
- Imipenem / cilastatin + Valproic acid Contraindicated
- Meropenem / vaborbactam + Valproic acid Contraindicated
- Meropenem + Valproic acid Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Valproic acid Major
Frequently asked questions
Can I take Aspirin rectal with Valproic acid?
MediHelp rates the interaction as moderate. Aspirin rectal and Valproic acid 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. Systemically absorbed aspirin displaces valproate from albumin and may inhibit its metabolism, increasing free valproate levels. Additive effects on platelet function also raise bleeding risk.
How serious is the interaction between Aspirin rectal and Valproic acid?
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 free valproate concentration and for toxicity or bleeding with regular salicylate use. Prefer paracetamol for analgesia or antipyresis where suitable.
What other medicines interact with Valproic acid?
MediHelp also lists interactions of Valproic acid with, for example, Ertapenem, Imipenem / cilastatin / relebactam, Imipenem / cilastatin. The full list is on the Valproic acid page.
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