Psychic and Psychomotor drugs that contain “Xantic”  bases such as caffeine or theophylline acts as stimulants of the central nervous system. At therapeutic doses, they stimulate mental function, increasing the ability to concentrate and pay attention, while at high doses they cause restlessness and insomnia, and can stimulate the respiratory, vasomotor and vagal bulbar centres, especially when they are depressed. Drugs rich in xanthine bases are : Coffee, Tea, Cola, Guarana, Camphor, Rosemary, Lobella, Strychine. These herbal medicine acts are classified as Hypnotic agents, sedatives, tranquilizers, anti-cholinergic, and analgestic agents.