Drug interactions
Amlodipine-hydrochlorothiazide-valsartan + Efavirenz
Severity: Minor
Amlodipine-hydrochlorothiazide-valsartan and Efavirenz: minor 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
Efavirenz induces CYP3A4 and may reduce amlodipine exposure, potentially weakening blood pressure control. The effect is variable and usually modest.
What this interaction means in plain words
Amlodipine-hydrochlorothiazide-valsartan and Efavirenz have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Amlodipine-hydrochlorothiazide-valsartan belongs to Cardiovascular; Efavirenz belongs to Anti Virals.
Why it happens
CYP3A4 induction by efavirenz increases amlodipine metabolism.
What to do
Monitor blood pressure after starting or stopping efavirenz and increase the amlodipine dose if control is inadequate.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Amlodipine-hydrochlorothiazide-valsartan
- Aliskiren + Amlodipine-hydrochlorothiazide-valsartan Contraindicated
- Amlodipine-hydrochlorothiazide-valsartan + Dofetilide Contraindicated
- Amlodipine-hydrochlorothiazide-valsartan + Sparsentan Contraindicated
- Aceclofenac + Amlodipine-hydrochlorothiazide-valsartan Major
- Aldesleukin + Amlodipine-hydrochlorothiazide-valsartan Major
- Amifostine + Amlodipine-hydrochlorothiazide-valsartan Major
Other interactions of Efavirenz
- Cobimetinib + Efavirenz Contraindicated
- Dienogest / estradiol valerate + Efavirenz Contraindicated
- Dihydroergotamine intranasal + Efavirenz Contraindicated
- Dihydroergotamine + Efavirenz Contraindicated
- Doravirine + Efavirenz Contraindicated
- Efavirenz + Elbasvir / grazoprevir Contraindicated
Frequently asked questions
Can I take Amlodipine-hydrochlorothiazide-valsartan with Efavirenz?
MediHelp rates the interaction as minor. Amlodipine-hydrochlorothiazide-valsartan and Efavirenz have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Efavirenz induces CYP3A4 and may reduce amlodipine exposure, potentially weakening blood pressure control. The effect is variable and usually modest.
How serious is the interaction between Amlodipine-hydrochlorothiazide-valsartan and Efavirenz?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure after starting or stopping efavirenz and increase the amlodipine dose if control is inadequate.
What other medicines interact with Amlodipine-hydrochlorothiazide-valsartan?
MediHelp also lists interactions of Amlodipine-hydrochlorothiazide-valsartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Amlodipine-hydrochlorothiazide-valsartan page.
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