Drug interactions
Captopril-hydrochlorothiazide + Fluphenazine
Severity: Moderate
Captopril-hydrochlorothiazide and Fluphenazine: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Fluphenazine can lower blood pressure through alpha-adrenergic blockade, adding to the effect of captopril and hydrochlorothiazide. Orthostatic hypotension and dizziness may occur, especially in older patients.
What this interaction means in plain words
Captopril-hydrochlorothiazide and Fluphenazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Captopril-hydrochlorothiazide belongs to Cardiovascular; Fluphenazine belongs to Central Nervous System.
Why it happens
Additive hypotension from alpha-1 adrenergic blockade by fluphenazine and the ACE inhibitor/diuretic effects.
What to do
Monitor blood pressure and orthostatic symptoms after starting or changing doses, and lower the antihypertensive dose if needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Captopril-hydrochlorothiazide
- Aliskiren + Captopril-hydrochlorothiazide Contraindicated
- Captopril-hydrochlorothiazide + Dofetilide Contraindicated
- Captopril-hydrochlorothiazide + Sacubitril / valsartan Contraindicated
- Aceclofenac + Captopril-hydrochlorothiazide Major
- Aldesleukin + Captopril-hydrochlorothiazide Major
- Amifostine + Captopril-hydrochlorothiazide Major
Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Captopril-hydrochlorothiazide with Fluphenazine?
MediHelp rates the interaction as moderate. Captopril-hydrochlorothiazide and Fluphenazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Fluphenazine can lower blood pressure through alpha-adrenergic blockade, adding to the effect of captopril and hydrochlorothiazide. Orthostatic hypotension and dizziness may occur, especially in older patients.
How serious is the interaction between Captopril-hydrochlorothiazide and Fluphenazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure and orthostatic symptoms after starting or changing doses, and lower the antihypertensive dose if needed.
What other medicines interact with Captopril-hydrochlorothiazide?
MediHelp also lists interactions of Captopril-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sacubitril / valsartan. The full list is on the Captopril-hydrochlorothiazide page.
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