Drug interactions
Ethinylestradiol + Green tea
Severity: Minor
Ethinylestradiol and Green tea: 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 can reduce caffeine clearance, so caffeine from green tea may have a stronger or longer effect in women taking estrogen-containing contraceptives. This may cause jitteriness, insomnia or palpitations with high intake.
What this interaction means in plain words
Ethinylestradiol and Green tea 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
Ethinylestradiol inhibits CYP1A2-mediated caffeine metabolism.
What to do
Advise moderating green tea and caffeine intake if symptoms of excess stimulation occur. No change to contraceptive therapy is needed.
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 Green tea
- Adenosine + Green tea Moderate
- Benzphetamine + Green tea Moderate
- Bortezomib + Green tea Moderate
- Dextroamphetamine + Green tea Moderate
- Diethylpropion + Green tea Moderate
- Ephedrine + Green tea Moderate
Frequently asked questions
Can I take Ethinylestradiol with Green tea?
MediHelp rates the interaction as minor. Ethinylestradiol and Green tea 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 can reduce caffeine clearance, so caffeine from green tea may have a stronger or longer effect in women taking estrogen-containing contraceptives. This may cause jitteriness, insomnia or palpitations with high intake.
How serious is the interaction between Ethinylestradiol and Green tea?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise moderating green tea and caffeine intake if symptoms of excess stimulation occur. No change to contraceptive therapy is needed.
What other medicines interact with Green tea?
MediHelp also lists interactions of Green tea with, for example, Adenosine, Benzphetamine, Bortezomib. The full list is on the Green tea page.
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