编辑同志： 我的孩子今年２岁多，近一年来一患感冒就咳嗽，孩子的姥姥心疼孩子咳个不停，给他从药店买来二三种止咳药。可孩子服用以后，有时非但无效，反而咳的更厉害了，请问这是为什么？ 天津 杨晓丽晓丽同志 您好！《母婴世界》的编辑们将你的问题转达给了我，有许多家长 Edit comrades: My child more than 2 years old this year, nearly a year of a cold cough, the child’s grandmother distressed children coughing, giving him two or three cough medicine from the pharmacy. After taking the child, and sometimes not only invalid, but cough worse, may I ask why? Tianjin Yang Xiaoli Xiao Li Hello! The editors of Maternal and Child World have relayed your questions to me and have many parents