Drug interactions
Amobarbital + Nelfinavir
Severity: Major
Amobarbital and Nelfinavir: 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 can induce CYP3A4 and may lower nelfinavir exposure. Reduced antiretroviral levels may cause loss of virologic suppression and resistance.
What this interaction means in plain words
Amobarbital and Nelfinavir 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; Nelfinavir belongs to Anti Virals.
Why it happens
Barbiturate induction of CYP3A4 increases the metabolism of nelfinavir.
What to do
Avoid the combination where possible and choose a non-inducing sedative or anticonvulsant. If it cannot be avoided, monitor HIV viral load and consider nelfinavir levels.
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 Nelfinavir
- Alfuzosin + Nelfinavir Contraindicated
- Avanafil + Nelfinavir Contraindicated
- Dronedarone + Nelfinavir Contraindicated
- Eletriptan + Nelfinavir Contraindicated
- Ergotamine + Nelfinavir Contraindicated
- Flibanserin + Nelfinavir Contraindicated
Frequently asked questions
Can I take Amobarbital with Nelfinavir?
MediHelp rates the interaction as major. Amobarbital and Nelfinavir 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 can induce CYP3A4 and may lower nelfinavir exposure. Reduced antiretroviral levels may cause loss of virologic suppression and resistance.
How serious is the interaction between Amobarbital and Nelfinavir?
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 where possible and choose a non-inducing sedative or anticonvulsant. If it cannot be avoided, monitor HIV viral load and consider nelfinavir levels.
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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