Drug interactions
Pseudoephedrine + Sodium citrate / citric acid
Severity: Moderate
Pseudoephedrine and Sodium citrate / citric 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
Citrate is metabolized to bicarbonate and can alkalinize the urine, reducing renal elimination of pseudoephedrine. Exposure may increase, raising the risk of sympathomimetic adverse effects.
What this interaction means in plain words
Pseudoephedrine and Sodium citrate / citric 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
Urinary alkalinization increases tubular reabsorption of the weakly basic pseudoephedrine, reducing its renal clearance.
What to do
Monitor blood pressure, heart rate and CNS stimulation with regular citrate use. Lower the pseudoephedrine dose if adverse effects 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 Pseudoephedrine
- Isocarboxazid + Pseudoephedrine Contraindicated
- Phenelzine + Pseudoephedrine Contraindicated
- Pseudoephedrine + Rasagiline Contraindicated
- Pseudoephedrine + Selegiline Contraindicated
- Pseudoephedrine + Selegiline transdermal Contraindicated
- Pseudoephedrine + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Pseudoephedrine with Sodium citrate / citric acid?
MediHelp rates the interaction as moderate. Pseudoephedrine and Sodium citrate / citric 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. Citrate is metabolized to bicarbonate and can alkalinize the urine, reducing renal elimination of pseudoephedrine. Exposure may increase, raising the risk of sympathomimetic adverse effects.
How serious is the interaction between Pseudoephedrine and Sodium citrate / citric 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 blood pressure, heart rate and CNS stimulation with regular citrate use. Lower the pseudoephedrine dose if adverse effects appear.
What other medicines interact with Pseudoephedrine?
MediHelp also lists interactions of Pseudoephedrine with, for example, Isocarboxazid, Phenelzine, Rasagiline. The full list is on the Pseudoephedrine page.
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