Drug interactions
Dexamethasone-neomycin-polymyxin + Estrogens esterified
Severity: Minor
Dexamethasone-neomycin-polymyxin and Estrogens esterified: minor 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
Dexamethasone is a weak to moderate CYP3A4 inducer and may lower exposure to estrogens metabolized by this enzyme. Reduced estrogen effect could cause loss of symptom control. With a combination eye or ear preparation, systemic exposure is usually small and the effect is likely modest.
What this interaction means in plain words
Dexamethasone-neomycin-polymyxin and Estrogens esterified have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Dexamethasone may induce CYP3A4-mediated estrogen metabolism, lowering estrogen concentrations.
What to do
Monitor for reduced estrogen response (for example recurrence of vasomotor symptoms) if systemic or prolonged dexamethasone is used. Adjust the estrogen dose if symptoms recur.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Dexamethasone-neomycin-polymyxin
- Dexamethasone-neomycin-polymyxin + Ketorolac Major
- Dexamethasone-neomycin-polymyxin + Lapatinib Major
- Dexamethasone-neomycin-polymyxin + Levofloxacin Major
- Dexamethasone-neomycin-polymyxin + Mifepristone Major
- Dexamethasone-neomycin-polymyxin + Moxifloxacin Major
- Aldesleukin + Dexamethasone-neomycin-polymyxin Moderate
Frequently asked questions
Can I take Dexamethasone-neomycin-polymyxin with Estrogens esterified?
MediHelp rates the interaction as minor. Dexamethasone-neomycin-polymyxin and Estrogens esterified have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Dexamethasone is a weak to moderate CYP3A4 inducer and may lower exposure to estrogens metabolized by this enzyme. Reduced estrogen effect could cause loss of symptom control. With a combination eye or ear preparation, systemic exposure is usually small and the effect is likely modest.
How serious is the interaction between Dexamethasone-neomycin-polymyxin and Estrogens esterified?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for reduced estrogen response (for example recurrence of vasomotor symptoms) if systemic or prolonged dexamethasone is used. Adjust the estrogen dose if symptoms recur.
What other medicines interact with Dexamethasone-neomycin-polymyxin?
MediHelp also lists interactions of Dexamethasone-neomycin-polymyxin with, for example, Ketorolac, Lapatinib, Levofloxacin. The full list is on the Dexamethasone-neomycin-polymyxin page.
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