Drug interactions
Butabarbital + Dexamethasone-tobramycin
Severity: Moderate
Butabarbital 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
Barbiturates are enzyme inducers and can reduce dexamethasone exposure, weakening its anti-inflammatory effect. Loss of steroid efficacy has been described with barbiturates and other inducers. The effect develops over days to weeks.
What this interaction means in plain words
Butabarbital 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.
Why it happens
Butabarbital induces CYP3A4 and other hepatic enzymes, accelerating dexamethasone metabolism.
What to do
Monitor clinical response and increase the corticosteroid dose if effect is inadequate, or choose a non-inducing sedative.
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
Frequently asked questions
Can I take Butabarbital with Dexamethasone-tobramycin?
MediHelp rates the interaction as moderate. Butabarbital 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. Barbiturates are enzyme inducers and can reduce dexamethasone exposure, weakening its anti-inflammatory effect. Loss of steroid efficacy has been described with barbiturates and other inducers. The effect develops over days to weeks.
How serious is the interaction between Butabarbital 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 and increase the corticosteroid dose if effect is inadequate, or choose a non-inducing sedative.
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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