Spironolactone and Tobramycin interaction
Spironolactone and Tobramycin: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Tobramycin (TOBI Podhaler) label · effective 2026-04-15
Some diuretics can enhance aminoglycoside toxicity by altering antibiotic concentrations in serum and tissue.
From the Spironolactone label · effective 2026-08-26
Worsening of renal function can also occur with concomitant use of nephrotoxic drugs (e.g., aminoglycosides, cisplatin, and NSAIDs).
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.