Frequent smoking can lead to different degrees of inflammatory changes in the lungs, most commonly chronic bronchitis. At this time, you need to take some drugs to achieve the effect of lung clearing and lung moistening, for example, you can choose Chinese patent medicine preparations such as lung clearing and phlegm relieving cough granules, nourishing yin and clearing lung pill, Cordyceps sinensis capsule, honey refined Chuanbei loquat extract, almond cough mixture, lung power cough combination, Guilong coughing and wheezing, Yu Pingfeng granules, Fangfeng Tong Sheng pill, snake bile Chenpi San, snake bile Chuanbei liquid and so on. All these drugs have certain effects of clearing and moistening the lung, tonifying the lung qi, strengthening the immunity of the lung, and also have certain effects of relieving cough and expectorant.