What is caffeine's model?

Caffeine's model refers to its molecular structure and how it interacts with biological systems, particularly its role as a stimulant. Chemically, caffeine is an alkaloid belonging to the xanthine class, with the formula C8H10N4O2. It primarily functions as an adenosine receptor antagonist, blocking the effects of adenosine, a neurotransmitter that promotes sleep and relaxation, thereby increasing alertness and reducing fatigue. This interaction underlies many of caffeine's physiological effects in humans.