Drug interactions
Betaxolol + Terazosin
Severity: Moderate
Betaxolol 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
Combined use gives additive blood pressure reduction, and dizziness or fainting on standing may be more likely, particularly at initiation. Systemic absorption of ophthalmic betaxolol is lower but not absent.
What this interaction means in plain words
Betaxolol 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.
Betaxolol belongs to Cardiovascular; Terazosin belongs to Genitourinary.
Why it happens
Additive hypotension from alpha-1 adrenergic blockade and beta-1 blockade.
What to do
Start terazosin at a low dose at bedtime and titrate slowly. Monitor orthostatic blood pressure and warn the patient about postural symptoms.
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 Terazosin
- Alfuzosin + Terazosin Major
- Amifostine + Terazosin Major
- Avanafil + Terazosin Major
- Doxazosin + Terazosin Major
- Dutasteride-tamsulosin + Terazosin Major
- Lofexidine + Terazosin Major
Other interactions of Betaxolol
- Acebutolol + Betaxolol Major
- Aldesleukin + Betaxolol Major
- Amifostine + Betaxolol Major
- Amiodarone + Betaxolol Major
- Atenolol-chlorthalidone + Betaxolol Major
- Atenolol + Betaxolol Major
Frequently asked questions
Can I take Betaxolol with Terazosin?
MediHelp rates the interaction as moderate. Betaxolol 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. Combined use gives additive blood pressure reduction, and dizziness or fainting on standing may be more likely, particularly at initiation. Systemic absorption of ophthalmic betaxolol is lower but not absent.
How serious is the interaction between Betaxolol 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: Start terazosin at a low dose at bedtime and titrate slowly. Monitor orthostatic blood pressure and warn the patient about postural symptoms.
What other medicines interact with Terazosin?
MediHelp also lists interactions of Terazosin with, for example, Alfuzosin, Amifostine, Avanafil. The full list is on the Terazosin page.
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