Drug interactions
Amobarbital + Fexinidazole
Severity: Major
Amobarbital and Fexinidazole: 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
Fexinidazole is a prodrug converted to active metabolites through several CYP enzymes, and its labeling advises avoiding CYP inducers. The direction and size of the effect with amobarbital are uncertain, and higher metabolite exposure could add to the QT prolongation risk. Barbiturate sedation may also confound neurological assessment in treated patients.
What this interaction means in plain words
Amobarbital and Fexinidazole 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.
Why it happens
Enzyme induction by amobarbital may alter fexinidazole conversion to its sulfoxide and sulfone metabolites; the exact effect is not well established.
What to do
Avoid concomitant use with CYP inducers and use an alternative sedative. If unavoidable, obtain an ECG and monitor electrolytes and QT interval.
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 Amobarbital
- Amobarbital + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Amobarbital + Doravirine Contraindicated
- Amobarbital + Elbasvir / grazoprevir Contraindicated
- Amobarbital + Isavuconazonium Contraindicated
- Amobarbital + Isocarboxazid Contraindicated
- Amobarbital + Lonafarnib Contraindicated
Frequently asked questions
Can I take Amobarbital with Fexinidazole?
MediHelp rates the interaction as major. Amobarbital and Fexinidazole 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. Fexinidazole is a prodrug converted to active metabolites through several CYP enzymes, and its labeling advises avoiding CYP inducers. The direction and size of the effect with amobarbital are uncertain, and higher metabolite exposure could add to the QT prolongation risk. Barbiturate sedation may also confound neurological assessment in treated patients.
How serious is the interaction between Amobarbital and Fexinidazole?
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 concomitant use with CYP inducers and use an alternative sedative. If unavoidable, obtain an ECG and monitor electrolytes and QT interval.
What other medicines interact with Amobarbital?
MediHelp also lists interactions of Amobarbital with, for example, Calcium / magnesium / potassium / sodium oxybates, Doravirine, Elbasvir / grazoprevir. The full list is on the Amobarbital page.
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