Drug interactions
Candesartan-hydrochlorothiazide + Tadalafil
Severity: Moderate
Candesartan-hydrochlorothiazide and Tadalafil: 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
Tadalafil is a vasodilator and can add to the blood pressure lowering of candesartan and hydrochlorothiazide. Symptomatic hypotension, dizziness or syncope may occur, particularly at treatment start or in volume-depleted patients.
What this interaction means in plain words
Candesartan-hydrochlorothiazide and Tadalafil 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.
Candesartan-hydrochlorothiazide belongs to Cardiovascular; Tadalafil belongs to Genitourinary.
Why it happens
Additive vasodilation and blood pressure lowering through PDE5 inhibition combined with antihypertensive action.
What to do
Start tadalafil at a low dose and monitor blood pressure and orthostatic symptoms. Counsel patients to rise slowly.
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 Candesartan-hydrochlorothiazide
- Aliskiren + Candesartan-hydrochlorothiazide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Sparsentan Contraindicated
- Acemetacin + Candesartan-hydrochlorothiazide Major
- Amifostine + Candesartan-hydrochlorothiazide Major
- Amiloride + Candesartan-hydrochlorothiazide Major
Other interactions of Tadalafil
- Amyl nitrite + Tadalafil Contraindicated
- Isosorbide dinitrate + Tadalafil Contraindicated
- Isosorbide mononitrate + Tadalafil Contraindicated
- Nitroglycerin po + Tadalafil Contraindicated
- Nitroglycerin rectal + Tadalafil Contraindicated
- Nitroglycerin sublingual + Tadalafil Contraindicated
Frequently asked questions
Can I take Candesartan-hydrochlorothiazide with Tadalafil?
MediHelp rates the interaction as moderate. Candesartan-hydrochlorothiazide and Tadalafil 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. Tadalafil is a vasodilator and can add to the blood pressure lowering of candesartan and hydrochlorothiazide. Symptomatic hypotension, dizziness or syncope may occur, particularly at treatment start or in volume-depleted patients.
How serious is the interaction between Candesartan-hydrochlorothiazide and Tadalafil?
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 tadalafil at a low dose and monitor blood pressure and orthostatic symptoms. Counsel patients to rise slowly.
What other medicines interact with Candesartan-hydrochlorothiazide?
MediHelp also lists interactions of Candesartan-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Candesartan-hydrochlorothiazide page.
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