Drug interactions
Bupivacaine implant + Flutamide
Severity: Moderate
Bupivacaine implant and Flutamide: 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
Flutamide can cause methemoglobinemia, and local anesthetics such as bupivacaine can also contribute to methemoglobin formation. Combined exposure may increase the risk of clinically significant methemoglobinemia, although systemic bupivacaine levels from an implant are modest.
What this interaction means in plain words
Bupivacaine implant and Flutamide 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
Additive oxidation of hemoglobin to methemoglobin by both drugs.
What to do
Watch for cyanosis, dyspnea, or low pulse oximetry readings after implant placement. Treat suspected methemoglobinemia promptly with methylene blue and stop the offending agents.
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 Flutamide
Frequently asked questions
Can I take Bupivacaine implant with Flutamide?
MediHelp rates the interaction as moderate. Bupivacaine implant and Flutamide 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. Flutamide can cause methemoglobinemia, and local anesthetics such as bupivacaine can also contribute to methemoglobin formation. Combined exposure may increase the risk of clinically significant methemoglobinemia, although systemic bupivacaine levels from an implant are modest.
How serious is the interaction between Bupivacaine implant and Flutamide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Watch for cyanosis, dyspnea, or low pulse oximetry readings after implant placement. Treat suspected methemoglobinemia promptly with methylene blue and stop the offending agents.
What other medicines interact with Flutamide?
MediHelp also lists interactions of Flutamide with, for example, Idelalisib, Levoketoconazole, Pexidartinib. The full list is on the Flutamide page.
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