Drug interactions
Probenecid + Sodium phenylbutyrate
Severity: Moderate
Probenecid and Sodium phenylbutyrate: 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
Probenecid reduces renal excretion of phenylbutyrate metabolites, including phenylacetate and phenylacetylglutamine. Accumulation may increase adverse effects such as neurotoxicity and affect ammonia control.
What this interaction means in plain words
Probenecid and Sodium phenylbutyrate 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.
Probenecid belongs to Genitourinary; Sodium phenylbutyrate belongs to Miscellaneous.
Why it happens
Probenecid inhibits renal tubular secretion of phenylbutyrate and its conjugated metabolites via organic anion transporters.
What to do
Monitor plasma ammonia and for neurological adverse effects; adjust the phenylbutyrate dose if signs of toxicity appear.
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 Probenecid
- Ketorolac intranasal + Probenecid Contraindicated
- Ketorolac + Probenecid Contraindicated
- Baricitinib + Probenecid Major
- Ceftazidime / avibactam + Probenecid Major
- Methotrexate + Probenecid Major
- Pralatrexate + Probenecid Major
Other interactions of Sodium phenylbutyrate
Frequently asked questions
Can I take Probenecid with Sodium phenylbutyrate?
MediHelp rates the interaction as moderate. Probenecid and Sodium phenylbutyrate 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. Probenecid reduces renal excretion of phenylbutyrate metabolites, including phenylacetate and phenylacetylglutamine. Accumulation may increase adverse effects such as neurotoxicity and affect ammonia control.
How serious is the interaction between Probenecid and Sodium phenylbutyrate?
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 plasma ammonia and for neurological adverse effects; adjust the phenylbutyrate dose if signs of toxicity appear.
What other medicines interact with Probenecid?
MediHelp also lists interactions of Probenecid with, for example, Ketorolac intranasal, Ketorolac, Baricitinib. The full list is on the Probenecid page.
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