Medical Dictionary


noun caf·fein·ism \-ˌiz-əm\

Medical Definition of caffeinism

  1. :  an abnormal condition caused by the consumption of large amounts of caffeine and marked by restlessness, nervousness, irritability, insomnia, diuresis, tremors, and tachycardia In general, more than 1.5 grams of caffeine a day can cause the typical symptoms of caffeinism: anxiety, insomnia, irritability and palpitations.—Richard A. Friedman, The New York Times, 6 Apr. 2004 I ran in to find her pale, in a cold sweat, with her heart racing. She had had four cups of coffee in two hours and was suffering from caffeinism.—People Weekly, 10 Sept. 1984

Seen and Heard

What made you want to look up caffeinism? Please tell us where you read or heard it (including the quote, if possible).


a brief usually trivial fact

Get Word of the Day daily email!