Drug interactions
Caffeine + Ethinylestradiol
Severity: Minor
Caffeine and Ethinylestradiol: 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
Ethinylestradiol reduces caffeine clearance, so caffeine effects last longer and are stronger in women taking estrogen-containing contraceptives. This may cause jitteriness, insomnia or palpitations with usual intake.
What this interaction means in plain words
Caffeine and Ethinylestradiol 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
Inhibition of CYP1A2-mediated caffeine metabolism by ethinylestradiol.
What to do
No dose change is needed; advise reducing caffeine intake if stimulant symptoms such as insomnia or palpitations develop.
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 Caffeine
- Caffeine + Ephedrine Major
- Caffeine + Fezolinetant Major
- Caffeine + Methylenedioxymethamphetamine Major
- Caffeine + Selegiline transdermal Major
- Adenosine + Caffeine Moderate
- Benzphetamine + Caffeine Moderate
Frequently asked questions
Can I take Caffeine with Ethinylestradiol?
MediHelp rates the interaction as minor. Caffeine and Ethinylestradiol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Ethinylestradiol reduces caffeine clearance, so caffeine effects last longer and are stronger in women taking estrogen-containing contraceptives. This may cause jitteriness, insomnia or palpitations with usual intake.
How serious is the interaction between Caffeine and Ethinylestradiol?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change is needed; advise reducing caffeine intake if stimulant symptoms such as insomnia or palpitations develop.
What other medicines interact with Caffeine?
MediHelp also lists interactions of Caffeine with, for example, Ephedrine, Fezolinetant, Methylenedioxymethamphetamine. The full list is on the Caffeine page.
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