Asthma Preparation

**Semantic type:** Chemical Viewed Functionally

**Definition:** Containing natural or synthetic agents, Asthma Preparations relieve asthma (a recurrent airway obstruction) in various ways by reducing bronchial spasm, dyspnea, allergic reaction, local inflammation, and pain. Anti-asthmatic agents can be mainly bronchodilators (beta-adrenoreceptor agonists, xanthines, muscarinic-receptor antagonists) and anti-inflammatory agents (glucocorticoids, cromolyn). Other agents, such as anti-histamines and antibiotics, may be used in asthma preparations. (NCI04)