Drug interactions
Caffeine + Ethinyl estradiol-norgestimate
Severity: Minor
Caffeine and Ethinyl estradiol-norgestimate: 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
Oral contraceptives containing ethinyl estradiol slow the elimination of caffeine, prolonging its half-life. Users may experience stronger or longer-lasting stimulant effects such as insomnia, jitteriness or palpitations.
What this interaction means in plain words
Caffeine and Ethinyl estradiol-norgestimate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Caffeine belongs to Miscellaneous; Ethinyl estradiol-norgestimate belongs to Endocrine.
Why it happens
Ethinyl estradiol inhibits CYP1A2, the main enzyme metabolizing caffeine.
What to do
No dose change is needed; advise patients to reduce caffeine intake if they experience anxiety, tremor, palpitations or sleep disturbance.
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 Ethinyl estradiol-norgestimate
- Ethinyl estradiol-norgestimate + Fezolinetant Contraindicated
- Ethinyl estradiol-norgestimate + Ombitasvir / paritaprevir / ritonavir and dasabuvir Contraindicated
- Ethinyl estradiol-norgestimate + Tranexamic acid Contraindicated
- Aminocaproic acid + Ethinyl estradiol-norgestimate Major
- Amobarbital + Ethinyl estradiol-norgestimate Major
- Anastrozole + Ethinyl estradiol-norgestimate Major
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 Ethinyl estradiol-norgestimate?
MediHelp rates the interaction as minor. Caffeine and Ethinyl estradiol-norgestimate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Oral contraceptives containing ethinyl estradiol slow the elimination of caffeine, prolonging its half-life. Users may experience stronger or longer-lasting stimulant effects such as insomnia, jitteriness or palpitations.
How serious is the interaction between Caffeine and Ethinyl estradiol-norgestimate?
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 patients to reduce caffeine intake if they experience anxiety, tremor, palpitations or sleep disturbance.
What other medicines interact with Ethinyl estradiol-norgestimate?
MediHelp also lists interactions of Ethinyl estradiol-norgestimate with, for example, Fezolinetant, Ombitasvir / paritaprevir / ritonavir and dasabuvir, Tranexamic acid. The full list is on the Ethinyl estradiol-norgestimate page.
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