Drug interactions
Aspirin / citric acid / sodium bicarbonate + Tobramycin
Severity: Moderate
Aspirin / citric acid / sodium bicarbonate and Tobramycin: 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
The aspirin in this effervescent product can reduce renal prostaglandin-dependent perfusion and may slow tobramycin elimination. This is best documented in premature neonates, though it can add renal risk in vulnerable adults.
What this interaction means in plain words
Aspirin / citric acid / sodium bicarbonate and Tobramycin 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
Aspirin-mediated prostaglandin inhibition reduces glomerular filtration and tobramycin clearance.
What to do
Monitor tobramycin troughs and serum creatinine, particularly in neonates, older adults or renal impairment. Use an alternative analgesic when possible.
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 Tobramycin
- Cidofovir + Tobramycin Contraindicated
- Adefovir + Tobramycin Major
- Amikacin + Tobramycin Major
- Amphotericin b deoxycholate + Tobramycin Major
- Amphotericin b + Tobramycin Major
- Atracurium + Tobramycin Major
Frequently asked questions
Can I take Aspirin / citric acid / sodium bicarbonate with Tobramycin?
MediHelp rates the interaction as moderate. Aspirin / citric acid / sodium bicarbonate and Tobramycin 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. The aspirin in this effervescent product can reduce renal prostaglandin-dependent perfusion and may slow tobramycin elimination. This is best documented in premature neonates, though it can add renal risk in vulnerable adults.
How serious is the interaction between Aspirin / citric acid / sodium bicarbonate and Tobramycin?
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 tobramycin troughs and serum creatinine, particularly in neonates, older adults or renal impairment. Use an alternative analgesic when possible.
What other medicines interact with Tobramycin?
MediHelp also lists interactions of Tobramycin with, for example, Cidofovir, Adefovir, Amikacin. The full list is on the Tobramycin page.
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