Latest / This Is Why with Dr. Busti
TMP-SMX + Spironolactone Drug Interaction: Why Potassium Can Rise
Trimethoprim-sulfamethoxazole, or TMP-SMX, and spironolactone can impair renal potassium excretion through different mechanisms. This lecture explains how trimethoprim’s amiloride-like inhibition of ENaC converges with mineralocorticoid-receptor antagonism—and why that can increase the risk of clinically important hyperkalemia.
Dr. Busti will explain how normal distal-nephron potassium handling works, which patients are most vulnerable, how to interpret the observational safety signal, and how clinicians can approach indication review, renal dosing, laboratory monitoring, medication…
The skinny
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