Drug interactions
Anagrelide + Efavirenz
Severity: Major
Anagrelide and Efavirenz: major interaction.
Last updated Sources: US FDA label
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
Both drugs can prolong the QT interval, and anagrelide may also cause palpitations and tachyarrhythmias. Combined use raises the risk of torsades de pointes.
What this interaction means in plain words
Anagrelide and Efavirenz can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Anagrelide belongs to Cardiovascular; Efavirenz belongs to Anti Virals.
Why it happens
Additive QT interval prolongation.
What to do
Avoid if possible. If used together, obtain a baseline ECG, correct potassium and magnesium, and monitor the ECG.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
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
Other interactions of Anagrelide
- Anagrelide + Panobinostat Contraindicated
- Anagrelide + Pimozide Contraindicated
- Anagrelide + Thioridazine Contraindicated
- Anagrelide + Vandetanib Contraindicated
- Abrocitinib + Anagrelide Major
- Alfuzosin + Anagrelide Major
Frequently asked questions
Can I take Anagrelide with Efavirenz?
MediHelp rates the interaction as major. Anagrelide and Efavirenz can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs can prolong the QT interval, and anagrelide may also cause palpitations and tachyarrhythmias. Combined use raises the risk of torsades de pointes.
How serious is the interaction between Anagrelide and Efavirenz?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid if possible. If used together, obtain a baseline ECG, correct potassium and magnesium, and monitor the ECG.
What other medicines interact with Efavirenz?
MediHelp also lists interactions of Efavirenz with, for example, Cobimetinib, Dienogest / estradiol valerate, Dihydroergotamine intranasal. The full list is on the Efavirenz page.
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