Torsemide and Triamterene and hydrochlorothiazide interaction
Torsemide and Triamterene and hydrochlorothiazide: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Triamterene and hydrochlorothiazide label · effective 2026-07-16
Hyperkalemia Abnormal elevation of serum potassium levels (≥5.5 mEq/liter) can occur with all potassium-sparing diuretic combinations, including triamterene and hydrochlorothiazide.
WARNINGS Hyperkalemia Abnormal elevation of serum potassium levels (≥5.5 mEq/liter) can occur with all potassium-sparing diuretic combinations, including triamterene and hydrochlorothiazide.
The development of hyperkalemia associated with potassium-sparing diuretics is accentuated in the presence of renal impairment (see CONTRAINDICATIONS ).
Lithium Lithium generally should not be given with diuretics because they reduce its renal clearance and increase the risk of lithium toxicity.
Thiazides may add to or potentiate the action of other antihypertensive drugs.
From the Torsemide label · effective 2026-07-21
Ototoxicity Tinnitus and hearing loss (usually reversible) have been observed with loop diuretics, including torsemide.
Non-Steroidal Anti-Inflammatory Drugs (NSAIDs): Reduced diuretic, natriuretic, and antihypertensive effects; risk of renal impairment.
Organic Anion Drugs: May decrease diuretic activity of torsemide.
The antihypertensive and diuretic effects of torsemide can be reduced by NSAIDs.
Monitor diuretic effect and blood pressure when used in combination with CYP2C9 inhibitor or inducer.
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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.