Drug interactions
Amobarbital + Tucatinib
Severity: Major
Amobarbital and Tucatinib: 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
Amobarbital may reduce tucatinib exposure through enzyme induction, risking reduced anticancer efficacy.
What this interaction means in plain words
Amobarbital and Tucatinib 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.
Amobarbital belongs to Central Nervous System; Tucatinib belongs to Oncology.
Why it happens
Induction of CYP3A4 by amobarbital increases tucatinib metabolism.
What to do
Avoid concomitant use with strong or moderate CYP3A inducers and select an alternative sedative. Monitor for loss of efficacy if it cannot be avoided.
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
Other interactions of Tucatinib
- Cisapride + Tucatinib Contraindicated
- Eletriptan + Tucatinib Contraindicated
- Ergotamine + Tucatinib Contraindicated
- Flibanserin + Tucatinib Contraindicated
- Ranolazine + Tucatinib Contraindicated
- Apalutamide + Tucatinib Major
Frequently asked questions
Can I take Amobarbital with Tucatinib?
MediHelp rates the interaction as major. Amobarbital and Tucatinib 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. Amobarbital may reduce tucatinib exposure through enzyme induction, risking reduced anticancer efficacy.
How serious is the interaction between Amobarbital and Tucatinib?
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 strong or moderate CYP3A inducers and select an alternative sedative. Monitor for loss of efficacy if it cannot be avoided.
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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