CH3 O Effects Caffeine increases oxidation and metabolism of fatty acids and increases physical stamina.
Caffeine can increase concentration and counteract fatigue.
It is a favorite drug for late night college study sessions and long stints of driving. In high levels it can cause insomnia, tremors, anorexia, restlessness, excitement, gastrointestinal disturbance, palpitations, and cardiac arrhythmia. Caffeine withdrawal is characterized by irritability, headache, feeling sleepy, and inability to achieve normal level of work. Aspirin may be effective for withdrawal headache. Coffee use may lead to heartburn and gastric reflux.