My son age 7 yrs weight 16.88/kg..frequently suffers from cold , cough and fever ...doctor said he is having allergic doctor recommended the medicines like; cofvector ls,montair lc kid syrup,fexy suspension,Avamys nasal spray and nikomox syrup.so I just want to ask you Sir,are this medicines ok to cure the problem my son is having..Please do inform thankyou very much..