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A group of naturally occurring agents present in caffeine, theophylline, and theobromine. They act on the central nervous system, stimulate the myocardium, relax smooth muscle, and promote diuresis. A commonly prescribed methylxanthine is theophylline, which is used primarily to treat asthma and chronic obstructive pulmonary disease.
n diuretic agent (e.g., aminophylline, caffeine, or theophylline) that serves as a smooth muscle relaxant and cardiac muscle and CNS stimulant. Clinically, it is employed as a bronchodilator.
methylated derivatives of xanthine, including caffeine, theobromine and theophylline.