What Are The Side Effects Of Budesal And Levolin?

Hi doctors my son is coughing from 2 weeks now when shown to doctors she suggested budesol,levolene,levolene,budesol for 2 days and also said to observe for a day and then if don t subside then use T Wysolene 10mg for 3 days. Q1.can I nebuslise him while sleeping? Q2.Does that tab has any side effects? My sons age is 2.9 years. Thank in advance.