Is It Safe To Have Omnicartil And Levolin For Cough?

My son suffering from Breathing, wheezing and regular cough. he breaths from his mouth. doctor suggested for X-ray and told us that he has adenoids and also allergy. Suggested Levolin and budate nebulizer medicine using for about 15 days. Omnicartol we are using from past 8 days and she has given allegra for 1 month. Please suggest whether using omnicartol and levolin is good for the child for long time