Green Tea: Side Effects And Who Must Not Consume It

Green Tea: Side Effects And Who Must Not Consume It - Page 2

Can People On Medication Drink Green Tea?

Green tea must not be taken along with these medications as it is known to cause negative reactions.
1. Highly Interactive: Stimulant drugs like Amphetamines, Nicotine, Cocaine and Ephedrine.
2. Moderately Interactive: Adenosine, Quinolone antibiotics, Birth control pills, Cimetidine (Tagamet), Clozapine (Clozaril), Dipyridamole (Persantine), Disulfiram (Antabuse), Estrogen pills, Fluvoxamine (Luvox), Lithium, Medications for depression (MAOIs), Hepatotoxic drugs, Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs), Pentobarbital (Nembutal), Phenylpropanolamin, Riluzole (Rilutek), Theophylline, Verapamil and Warfarin.
3. Slightly Interactive: Alcohol, Fluconazole, Anti-diabetes drugs, Mexiletine (Mexitil) and Terbinafine.
For a more detailed description, read the article here.

How to Consume Green Tea?

The United Kingdom Tea Council recommends drinking not more than 6 cups of tea a day. For the best health benefits, 3 to 4 cups is recommended. However, doses of green tea vary significantly, but usually range between 1-5 cups daily is considered safe. The commonly used dose of green tea is based on the amount typically consumed in Asian countries, which is about 3 cups per day, providing 240-320 mg of the active ingredients, polyphenols. To make tea, people typically use 1 tsp of tea leaves in 8 ounces of boiling water.
Drink green tea when it’s freshly made, but slightly cooled. Scalding tea can damage your digestive system. Moreover, recent studies suggest that too much hot tea can promote throat cancer. Compounds in tea like catechins, theanine, and vitamins C and B diminish over time through oxidation, so the health benefits are strongest with fresh tea. If you’re brewing the same tea leaves, brew them in moderation. With each successive infusion, cancerous substances in the leaves themselves (often pesticides) are drawn out and can even be toxic. Old tea can also harbour bacteria, especially since its antibacterial properties diminish with time.

Tea Dosage For Ailments

.Headache: Tea providing up to 250 mg of caffeine per day, or approximately 3 cups of tea per day.
.Improved thinking: Tea providing 60 mg of caffeine, or approximately one cup.
.Reducing cholesterol: Drinking 10 or more cups per day has been associated with decreased cholesterol levels. Theaflavin-enriched green tea extract, 375 mg daily for 12 weeks, has also been used for lowering cholesterol.
.Preventing Parkinson’s disease: Men consuming 421-2716 mg total caffeine (approximately 5-33 cups of green tea) daily have the lowest risk of developing Parkinson’s disease. However, a significantly lower risk is also associated with consumption of as little as 124-208 mg of caffeine (approximately 1-3 cups of green tea) daily. In women, more moderate caffeine consumption seems to be best, equivalent to approximately 1-4 cups of green tea per day.

Topical Application Dosage

.Human papillomavirus (HPV) infections of the cervix: Green tea ointment alone or in combination with oral green tea extract, twice weekly for 8-12 weeks.
.Genital warts: a specific green tea extract ointment (Veregen, Bradley Pharmaceuticals) providing 15% kunecatechins applied three times daily to external warts for up to 16 weeks has been used.


You don’t have to quit drinking your favorite cuppa green tea, but if you have any of the above mentioned medical conditions or taking prescription drugs, exercise caution and consult your doctor about how many cups you can have per day. Moderation is key to enjoy the full benefits of green tea.

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Disclaimer: All information, data, and material contained, presented, or provided on is for awareness purposes only. It is not to be construed or intended as providing medical or legal advice. The decisions you make about your family's health care are important and should be made in consultation with a competent medical professional. We are not physicians and do not claim to be. Any views expressed herein are not necessarily those held by
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