Benazepril and hydrochlorothiazide and Olanzapine and fluoxetine interaction
Benazepril and hydrochlorothiazide and Olanzapine and fluoxetine: 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 Benazepril and hydrochlorothiazide (Lotensin HCT) label · effective 2026-02-24
Drugs that alter gastrointestinal motility: The bioavailability of thiazide-type diuretics may be increased by anticholinergic agents (e.g., atropine, biperiden), apparently due to a decrease in gastrointestinal motility and the stomach emptying rate.
From the Olanzapine and fluoxetine label · effective 2026-03-31
…and fluoxetine capsules should be used with particular caution in patients with known cardiovascular disease (history of myocardial infarction or ischemia, heart failure, or conduction abnormalities), cerebrovascular disease, or conditions that would predispose patients to hypotension (dehydration, hypovolemia, and treatment with antihypertensive medications).
Also, patients taking diuretics or who are otherwise volume depleted may be at greater risk.
Antihypertensive Agent : Enhanced antihypertensive effect ( 7.7 )
Antihypertensive Agents — Because of the potential for olanzapine to induce hypotension, olanzapine and fluoxetine capsules may enhance the effects of certain antihypertensive agents [see Warnings and Precautions ( 5.11 )] .
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.