现有哮喘药物大体可分为预防性药物和缓解性药物两大类。预防性药物可以控制呼吸道肿胀发炎,但见效慢,需要长期规律服用;而缓解性药物可以直接刺激呼吸道使其舒张,能够马上改善呼吸状况,因此许多哮喘患者长期依赖缓解性药物。但英国一项新研究发现,对某些患者来说,频繁使用此类 The existing asthma drugs can be divided into preventive medicine and palliative drugs in two broad categories. Prophylactic drugs can control the swelling of the respiratory tract inflammation, but slow effective, the need for long-term regular use; and palliative drugs can directly stimulate the respiratory tract to relax, can immediately improve respiratory status, many patients with asthma long-term remission of drugs. However, a new British study found that for some patients, frequent use of such