Asthma

Patient: Dear Doctor,My son is 4 years of age.he has wheezing since he was 1.5 years of age.his blood test shows eosonophil count as high as 14%.he have been in homeopathic treatment to cure asthma but with fail.now he has been prescribed montelukast.is it safe to use that?how long he will have to take that.will it cure asthma life long?or will asthma appear agian after years?he gets asthma every month.in which one day he will have heavy whheezing then it subsides.i fear now whether all those asthmatic episodes made any irreversible damage to lungs of my little baby.please help me,regards jas

Doctor: