caffeine /kafēn″, kaf″ē·in/ [Ar, qahwah, coffee] , a central nervous system stimulant. ▪ INDICATIONS: It is prescribed to counteract migraine, drowsiness, and mental fatigue. ▪ CONTRAINDICATIONS: It is used with caution in patients with heart disease and peptic ulcer. Known hypersensitivity to this drug prohibits its use. ▪ ADVERSE EFFECTS: Among the most serious adverse reactions are tachycardia and diuresis. GI distress, restlessness, and insomnia are common.
