Drug interactions
Amobarbital + Doxycycline
Severity: Moderate
Amobarbital and Doxycycline: moderate 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
Barbiturates induce hepatic enzymes and can shorten the half-life of doxycycline, lowering its blood levels. This may lead to subtherapeutic antibiotic exposure and treatment failure.
What this interaction means in plain words
Amobarbital and Doxycycline can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Amobarbital belongs to Central Nervous System; Doxycycline belongs to Anti Bacterial.
Why it happens
Barbiturate-induced hepatic enzyme activity increases doxycycline metabolism and clearance.
What to do
Monitor clinical response and consider a higher or more frequent doxycycline dose, or an alternative antibiotic, for serious infections. The effect may persist for days after stopping the barbiturate.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Doxycycline
- Acitretin + Doxycycline Contraindicated
- Aminolevulinic acid + Doxycycline Major
- Cholera vaccine + Doxycycline Major
- Doxycycline + Isotretinoin Major
- Doxycycline + Methoxyflurane Major
- Doxycycline + Microbiota Major
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 Doxycycline?
MediHelp rates the interaction as moderate. Amobarbital and Doxycycline can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Barbiturates induce hepatic enzymes and can shorten the half-life of doxycycline, lowering its blood levels. This may lead to subtherapeutic antibiotic exposure and treatment failure.
How serious is the interaction between Amobarbital and Doxycycline?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response and consider a higher or more frequent doxycycline dose, or an alternative antibiotic, for serious infections. The effect may persist for days after stopping the barbiturate.
What other medicines interact with Doxycycline?
MediHelp also lists interactions of Doxycycline with, for example, Acitretin, Aminolevulinic acid, Cholera vaccine. The full list is on the Doxycycline page.
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