Is there such a thing as too much coffee??
Consumption of more than 250 mg per day can lead to a condition known as caffeinism.
➤ heart palpitations
Note: an average 8 oz. cup of coffee contains approximately 95 mg of caffeine.
Iancu I, Olmer A, Strous RD (2007). "Caffeinism: History, clinical features, diagnosis, and treatment". In Smith BD, Gupta U, Gupta BS. Caffeine and activation theory: effects on health and behavior. CRC Press. pp. 331–344. ISBN 978-0-8493-7102-8.