Drug interactions
Doxycycline + Secobarbital
Severity: Moderate
Doxycycline and Secobarbital: 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 such as secobarbital can lower doxycycline concentrations and shorten its half-life. This may reduce antibacterial effectiveness.
What this interaction means in plain words
Doxycycline and Secobarbital 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.
Doxycycline belongs to Anti Bacterial; Secobarbital belongs to Central Nervous System.
Why it happens
Barbiturate induction of hepatic enzymes increases doxycycline metabolism.
What to do
Monitor for treatment failure and consider a higher or more frequent doxycycline dose, or an alternative antibiotic for serious infections.
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 Secobarbital
- Calcium / magnesium / potassium / sodium oxybates + Secobarbital Contraindicated
- Doravirine + Secobarbital Contraindicated
- Elbasvir / grazoprevir + Secobarbital Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Secobarbital Contraindicated
- Isavuconazonium + Secobarbital Contraindicated
- Lonafarnib + Secobarbital Contraindicated
Frequently asked questions
Can I take Doxycycline with Secobarbital?
MediHelp rates the interaction as moderate. Doxycycline and Secobarbital 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 such as secobarbital can lower doxycycline concentrations and shorten its half-life. This may reduce antibacterial effectiveness.
How serious is the interaction between Doxycycline and Secobarbital?
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 for treatment failure and consider a higher or more frequent doxycycline dose, or an alternative antibiotic for serious infections.
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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