Drug interactions
Amobarbital + Dexamethasone-tobramycin
Severity: Moderate
Amobarbital and Dexamethasone-tobramycin: 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
Amobarbital is an enzyme inducer and can speed up the breakdown of dexamethasone, reducing its anti-inflammatory effect. The loss of efficacy may become clinically relevant during prolonged barbiturate use.
What this interaction means in plain words
Amobarbital and Dexamethasone-tobramycin 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; Dexamethasone-tobramycin belongs to Anti Bacterial.
Why it happens
Barbiturate-mediated induction of CYP3A4 increases dexamethasone clearance.
What to do
Monitor clinical response to dexamethasone and increase the corticosteroid dose if the effect is diminished. Reassess the dose when the barbiturate is stopped.
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 Dexamethasone-tobramycin
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 Dexamethasone-tobramycin?
MediHelp rates the interaction as moderate. Amobarbital and Dexamethasone-tobramycin 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 is an enzyme inducer and can speed up the breakdown of dexamethasone, reducing its anti-inflammatory effect. The loss of efficacy may become clinically relevant during prolonged barbiturate use.
How serious is the interaction between Amobarbital and Dexamethasone-tobramycin?
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 to dexamethasone and increase the corticosteroid dose if the effect is diminished. Reassess the dose when the barbiturate is stopped.
What other medicines interact with Dexamethasone-tobramycin?
MediHelp also lists interactions of Dexamethasone-tobramycin with, for example, Capreomycin, Carboplatin, Ciprofloxacin. The full list is on the Dexamethasone-tobramycin page.
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