Drug interactions
Exemestane + Pentobarbital
Severity: Moderate
Exemestane and Pentobarbital: 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
Pentobarbital is a barbiturate enzyme inducer that may lower exemestane concentrations, possibly reducing its efficacy in breast cancer.
What this interaction means in plain words
Exemestane and Pentobarbital 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
Barbiturates induce CYP3A4, increasing exemestane metabolism.
What to do
Consider increasing exemestane to 50 mg daily after a meal if a potent inducer is required long term, or choose a non-inducing alternative.
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 Exemestane
Frequently asked questions
Can I take Exemestane with Pentobarbital?
MediHelp rates the interaction as moderate. Exemestane and Pentobarbital 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. Pentobarbital is a barbiturate enzyme inducer that may lower exemestane concentrations, possibly reducing its efficacy in breast cancer.
How serious is the interaction between Exemestane and Pentobarbital?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider increasing exemestane to 50 mg daily after a meal if a potent inducer is required long term, or choose a non-inducing alternative.
What other medicines interact with Exemestane?
MediHelp also lists interactions of Exemestane with, for example, Bazedoxifene-conjugated estrogens, Desogestrel-ethinyl estradiol, Estradiol. The full list is on the Exemestane page.
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