Furosemide and Lisinopril and hydrochlorothiazide interaction

Furosemide and Lisinopril and hydrochlorothiazide: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.

Moderate

Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.

What the FDA labels say

From the Furosemide label · effective 2026-05-13

Moderate

Angiotensin converting enzyme inhibitors or angiotensin II receptor blockers May lead to severe hypotension and deterioration in renal function, including renal failure.

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Moderate

Monitor for changes in blood pressure and renal function and interrupt or reduce the dosage of furosemide, angiotensin converting enzyme inhibitors, or angiotensin receptor blockers if needed.

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Moderate

Monitor for changes in blood pressure and adjust the dose of other antihypertensive drugs if needed.

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Moderate

Monitor diuretic effects of furosemide and adjust the dose of furosemide if needed.

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Minor

Patients receiving both indomethacin and furosemide should be observed closely to determine if the desired diuretic and/or antihypertensive effect of furosemide is achieved.

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From the Lisinopril and hydrochlorothiazide (Zestoretic) label · effective 2025-03-31

Moderate

Hypotension and Related Effects: Excessive hypotension was rarely seen in uncomplicated hypertensive patients but is a possible consequence of lisinopril use in salt/volume-depleted persons such as those treated vigorously with diuretics or patients on dialysis (see PRECAUTIONS, Drug Interactions and ADVERSE REACTIONS ).

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Moderate

Such patients should be followed closely for the first two weeks of treatment and whenever the dose of lisinopril and/or diuretic is increased.

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Moderate

Drug Interactions Lisinopril Hypotension - Patients on Diuretic Therapy: Patients on diuretics and especially those in whom diuretic therapy was recently instituted, may occasionally experience an excessive reduction of blood pressure after initiation of therapy with lisinopril.

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Moderate

If it is necessary to continue the diuretic, initiate therapy with lisinopril at a dose of 5 mg daily, and provide close medical supervision after the initial dose for at least two hours and until blood pressure has stabilized for at least an additional hour (see WARNINGS , and DOSAGE AND ADMINISTRATION ).

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Moderate

When a diuretic is added to the therapy of a patient receiving lisinopril, an additional antihypertensive effect is usually observed (see DOSAGE AND ADMINISTRATION ).

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Not 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.