#caffeine

• Alkaloid — A nitrogenous organic substance, typically possessing a basic (alkaline) character and a complex heterocyclic structure, primarily biosynthesized by plants, but also by certain fungi or animals. Alkaloids exhibit intense pharmacodynamic action on the central nervous system and the human body, functioning, depending on the dosage, as essential medicines, stimulants, or highly violent poisons (for example: morphine, caffeine, nicotine, atropine, quinine).
• Analeptic — A substance or medication with a potent stimulating action on the central nervous system, structurally utilized to revitalize vital functions, particularly to stimulate respiratory and circulatory centers in the brainstem. In a precise clinical sense, these compounds (such as caffeine or doxapram) are administered in cases of respiratory collapse, acute intoxications with depressants, or to shorten the post-anesthetic coma period.
• Antisoporific — Counteracting, preventing, or eliminating drowsiness, lethargy, and torpor; a pharmacological substance or natural stimulant compound that induces alertness, keeping the body awake by blocking receptors responsible for sleep induction. Broadly, it refers to any external stimulus or activity that boosts mental vigilance and eliminates chronic fatigue.