合理应用平喘药,可以提高疗效,减少不良反应,收到事半功倍的效果。以下就这方面谈几个问题。一、β_2受体兴奋剂的耐受性反复或长期应用β_2,受体兴奋剂,病人对这类药物的反应性降低,形成耐受性(tolerance)。这种耐受性一般在用药后1～2周出现,但在继续用药过程中,反应性不会持续下降,而是稳定于一定程度。耐受性形成与用药剂量和间隔有关, Reasonable application of antiasthmatic drugs, can improve the curative effect, reduce adverse reactions, receive a multiplier effect. Here are a few questions on this. First, β_2 receptor agonist tolerance Repeated or long-term use of β_2, receptor agonists, the patient’s response to such drugs decreased, the formation of tolerance (tolerance). This tolerance is generally 1 to 2 weeks after treatment appears, but in the process of continuing medication, reactivity will not continue to decline, but stabilized at a certain level. The formation of tolerance depends on dose and interval of administration,