Compound Methoxyphenamine is a compound preparation in which Methoxyphenamine activates β2 receptors, which dilates bronchial smooth muscle and has the effect of treating bronchospasm. Compound methocarbamol contains aminophylline, which can improve smooth muscle spasm, reduce bronchial mucosal congestion and edema, and have anti-inflammatory effects. It contains chlorpheniramine maleate, which is an antihistamine drug with anti-allergic and sedative efficacy, reducing metamorphosis, and has obvious efficacy in controlling asthma attack and variant asthma.