Drug interactions
Caffeine + Green tea
Severity: Minor
Caffeine 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
Green tea contains caffeine, so taking it with caffeine supplements or beverages adds to total stimulant intake. This may cause nervousness, insomnia, tachycardia and palpitations.
What this interaction means in plain words
Caffeine 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.
Caffeine belongs to Miscellaneous; Green tea belongs to Gastrointestinal Tract.
Why it happens
Additive central nervous system stimulation from caffeine content.
What to do
Count green tea toward total daily caffeine intake and reduce other caffeine sources if stimulant effects appear.
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
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 Green tea?
MediHelp rates the interaction as minor. Caffeine 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. Green tea contains caffeine, so taking it with caffeine supplements or beverages adds to total stimulant intake. This may cause nervousness, insomnia, tachycardia and palpitations.
How serious is the interaction between Caffeine 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: Count green tea toward total daily caffeine intake and reduce other caffeine sources if stimulant effects appear.
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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