Benazepril and hydrochlorothiazide and Trandolapril interaction

Benazepril and hydrochlorothiazide and Trandolapril: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.

Major

Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.

What the FDA labels say

From the Benazepril and hydrochlorothiazide (Lotensin HCT) label · effective 2026-02-24

Major

Lotensin HCT is also contraindicated in patients who are hypersensitive to benazepril, to any other ACE inhibitor, to hydrochlorothiazide, or to other sulfonamide-derived drugs.

Contraindicationsby drug classView label on DailyMed
Moderate

Like other ACE inhibitors, benazepril has been only rarely associated with hypotension in uncomplicated hypertensive patients.

Warningsby drug classView label on DailyMed
Moderate

The thiazide component of Lotensin HCT may potentiate the action of other antihypertensive drugs, especially ganglionic or peripheral adrenergic-blocking drugs.

Warningsby drug classView label on DailyMed
Moderate

Other ACE inhibitors have had less than additive effects with beta-adrenergic blockers, presumably because drugs of both classes lower blood pressure by inhibiting parts of the renin-angiotensin system.

Drug interactionsby drug classView label on DailyMed
Minor

Lotensin HCT should be used cautiously in patients receiving concomitant therapy with other antihypertensives.

Warningsby drug classView label on DailyMed

From the Trandolapril label · effective 2024-05-30

Moderate

Like other ACE inhibitors, trandolapril has only rarely been associated with symptomatic hypotension in uncomplicated hypertensive patients.

Warningsby drug classView label on DailyMed
Moderate

Symptomatic hypotension is most likely to occur in patients who have been salt- or volume-depleted as a result of prolonged treatment with diuretics, dietary salt restriction, dialysis, diarrhea, or vomiting.

Warningsby drug classView label on DailyMed
Moderate

These patients should be followed closely during the first 2 weeks of treatment and, thereafter, whenever the dosage of trandolapril or diuretic is increased.

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Moderate

A transient hypotensive response is not a contraindication to further doses; however, lower doses of trandolapril or reduced concomitant diuretic therapy should be considered.

Warningsby drug classView label on DailyMed
Moderate

As with other ACE inhibitors, periodic monitoring of white blood cell counts in patients with collagen-vascular disease and/or renal disease should be considered.

Warningsby drug classView label on DailyMed

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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.