Drug interactions
Ivosidenib + Lofexidine
Severity: Major
Ivosidenib and Lofexidine: major 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
Both agents can prolong the QTc interval, so use together raises the risk of torsades de pointes and other serious arrhythmias. Lofexidine-related bradycardia may increase susceptibility.
What this interaction means in plain words
Ivosidenib and Lofexidine 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.
Ivosidenib belongs to Oncology; Lofexidine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic QT prolongation.
What to do
Avoid the combination if an alternative exists; otherwise monitor ECG and electrolytes at baseline and regularly. Reduce or interrupt a drug if QTc becomes markedly prolonged.
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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Other interactions of Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Other interactions of Ivosidenib
- Alfuzosin + Ivosidenib Major
- Amiodarone + Ivosidenib Major
- Amisulpride + Ivosidenib Major
- Amitriptyline + Ivosidenib Major
- Amobarbital + Ivosidenib Major
- Anagrelide + Ivosidenib Major
Frequently asked questions
Can I take Ivosidenib with Lofexidine?
MediHelp rates the interaction as major. Ivosidenib and Lofexidine 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 agents can prolong the QTc interval, so use together raises the risk of torsades de pointes and other serious arrhythmias. Lofexidine-related bradycardia may increase susceptibility.
How serious is the interaction between Ivosidenib and Lofexidine?
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 the combination if an alternative exists; otherwise monitor ECG and electrolytes at baseline and regularly. Reduce or interrupt a drug if QTc becomes markedly prolonged.
What other medicines interact with Lofexidine?
MediHelp also lists interactions of Lofexidine with, for example, Adagrasib, Alfuzosin, Amiodarone. The full list is on the Lofexidine page.
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