Hello sen, with out commenting on others treatment, let us proceed to analyse your childs problem. When a child has severe cough and you feel that the chest is congested we should not use medicines which are indicated for dry cough. On the label of the bottles you are using it will be specifically written for dry cough only. Other drug should be avoided when he has vomiting. Kindly see the doctor again and proceed. 1. Cough ending in vomiting 2. night time cough 3. Continuous cough 4 or 5 strokes 4. Every hour once cough All these indicate your child may require nebulisation If the running nose is thick and yellow nose tip becomes red if there is ear pain neck glands the child may require antibiotics If the child is irritable, not able to lie down flat and develops fever are other indications for hospital review. In short this child requires medical review with regards