Drug interactions
Captopril-hydrochlorothiazide + Terazosin
Severity: Moderate
Captopril-hydrochlorothiazide and Terazosin: 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
Terazosin commonly causes first-dose and orthostatic hypotension, which can be intensified by an ACE inhibitor and thiazide diuretic. Syncope and falls are possible.
What this interaction means in plain words
Captopril-hydrochlorothiazide and Terazosin 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; Terazosin belongs to Genitourinary.
Why it happens
Additive hypotensive effects of alpha-1 blockade with ACE inhibition and diuresis.
What to do
Give the first terazosin dose at bedtime at a low dose and titrate slowly. Monitor standing blood pressure and reduce other antihypertensives 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 Terazosin
- Alfuzosin + Terazosin Major
- Amifostine + Terazosin Major
- Avanafil + Terazosin Major
- Doxazosin + Terazosin Major
- Dutasteride-tamsulosin + Terazosin Major
- Lofexidine + Terazosin Major
Frequently asked questions
Can I take Captopril-hydrochlorothiazide with Terazosin?
MediHelp rates the interaction as moderate. Captopril-hydrochlorothiazide and Terazosin 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. Terazosin commonly causes first-dose and orthostatic hypotension, which can be intensified by an ACE inhibitor and thiazide diuretic. Syncope and falls are possible.
How serious is the interaction between Captopril-hydrochlorothiazide and Terazosin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give the first terazosin dose at bedtime at a low dose and titrate slowly. Monitor standing blood pressure and reduce other antihypertensives 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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