To hear audio pronunciation of this topic, purchase a subscription or log in.
[Fr. café, coffee + -ine]
C8H10N4O2; an alkaloid present in coffee, chocolate, tea, many cola drinks, cocoa, and some over-the-counter medicines. The amount of caffeine in beverages varies from 40 to 180 mg in 6 oz (180 mL) of coffee, from 2 to 5 mg in decaffeinated coffee, and from 20 to 110 mg in 5 oz (150 mL) of tea. The caffeine in cola drinks ranges from 30 to 90 mg in a 360-mL (12-oz) serving. The pharmacological action of caffeine includes stimulation of the central nervous system (CNS), improvements in respiratory function, increases in the secretion of gastric acid and pepsin, elevation of free fatty acids in plasma, diuresis, increase in the basal metabolic rate, decrease in total sleep time, and possible increase in blood glucose level. Caffeine is used in neonatal intensive care to facilitate and sustain successful weaning from mechanical ventilation. It is considered an ergogenic aid in athletics because it tends to enhance endurance and improves reaction time. Adverse effects include drug dependence and withdrawal in some habitual users.
SEE: caffeine intoxication; SEE: caffeine withdrawal headache.
There's more to see -- the rest of this topic is available only to subscribers.
Venes, Donald, editor. "Caffeine." Taber's Medical Dictionary, 24th ed., F.A. Davis Company, 2021. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/749351/all/caffeine.
Caffeine. In: Venes DD, ed. Taber's Medical Dictionary. F.A. Davis Company; 2021. https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/749351/all/caffeine. Accessed June 3, 2023.
Caffeine. (2021). In Venes, D. (Ed.), Taber's Medical Dictionary (24th ed.). F.A. Davis Company. https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/749351/all/caffeine
Caffeine [Internet]. In: Venes DD, editors. Taber's Medical Dictionary. F.A. Davis Company; 2021. [cited 2023 June 03]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/749351/all/caffeine.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - caffeine ID - 749351 ED - Venes,Donald, BT - Taber's Medical Dictionary UR - https://nursing.unboundmedicine.com/nursingcentral/view/Tabers-Dictionary/749351/all/caffeine PB - F.A. Davis Company ET - 24 DB - Nursing Central DP - Unbound Medicine ER -