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Does Tobramycin Inhalation Solution Interact with Ethacrynic Acid?

Tobramycin Inhalation Solution and Ethacrynic Acid have a contraindicated drug interaction according to U.S. FDA drug labeling data. Should not be administered concomitantly; diuretics can enhance aminoglycoside toxicity by altering antibiotic concentrations in serum and tissue. The mechanism involves enhanced aminoglycoside toxicity through altered serum and tissue antibiotic concentrations. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Contraindicated
Tobramycin Inhalation Solution Class
Aminoglycoside Antibacterial
Ethacrynic Acid Class
Loop Diuretic
Management
Do not take together
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Tobramycin Inhalation Solution and Ethacrynic Acid occurs because enhanced aminoglycoside toxicity through altered serum and tissue antibiotic concentrations. Clinically, this means should not be administered concomitantly; diuretics can enhance aminoglycoside toxicity by altering antibiotic concentrations in serum and tissue. Because of the severity of this interaction, these medications are contraindicated — meaning they should not be taken together under any circumstances. If you are currently taking both, contact your healthcare provider immediately to discuss alternatives.

What To Tell Your Doctor or Pharmacist

If you are taking Tobramycin Inhalation Solution and your doctor is considering prescribing Ethacrynic Acid (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask about alternative medications that do not interact with your current regimen
  • Ask how frequently you should be monitored while these are co-prescribed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Tobramycin Inhalation Solution(Tobramycin Inhalation Solution)+💊 Ethacrynic Acid(Ethacrynic Acid)

Severity & Interaction Details

⛔
contraindicated
Avoid this combination
FDA labeling lists this pair as contraindicated. The risk outweighs the benefit in nearly all cases.
Severity scale
MinorContra
On record
Yes
Drug A class
Aminoglycoside Antibacterial
Drug B class
Loop Diuretic
Source
NLP:tobramycin inhalation

What this means in plain English

Should not be administered concomitantly; diuretics can enhance aminoglycoside toxicity by altering antibiotic concentrations in serum and tissue.

What the FDA label says

"Enhanced aminoglycoside toxicity through altered serum and tissue antibiotic concentrations"

📖 Source: NLP:tobramycin inhalation

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Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine. For informational purposes only. Always consult your pharmacist or physician.