Drug interactions
Amobarbital + Norgestrel
Severity: Major
Amobarbital and Norgestrel: 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 lower progestin levels and reduce the reliability of norgestrel contraception, risking unintended pregnancy.
What this interaction means in plain words
Amobarbital and Norgestrel 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; Norgestrel belongs to Endocrine.
Why it happens
CYP3A4 induction increases progestin metabolism.
What to do
Use an additional barrier method or another contraceptive, and continue backup after stopping amobarbital for about 28 days.
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 Norgestrel
Frequently asked questions
Can I take Amobarbital with Norgestrel?
MediHelp rates the interaction as major. Amobarbital and Norgestrel 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 lower progestin levels and reduce the reliability of norgestrel contraception, risking unintended pregnancy.
How serious is the interaction between Amobarbital and Norgestrel?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use an additional barrier method or another contraceptive, and continue backup after stopping amobarbital for about 28 days.
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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