Is There A Permanent Cure In Ayurveda For Allergies?

sir,my name is sanjeev i live in bangalore my son having allergic to Parthanium , ant bite, Bed mites. He is undergoing treatment from a asthuma & allergic doctor in Mysore. In fact he only used some technique and identified that he is allergic to those mentioned. He has given a vial containinig some liquid and said that it is an antidote to the allergy. The liquid is given early morning in drops, he started with one drop and slowly almost after 1 year he is now at 4 drops. The drops should not be stopped not even for a day. But whenever he gets fever the drops has to be stopped. Along with the drops he is taking medicine (Duolin & Esiflow) for past one year. when his cold gets aggrevated(Flum turning to dark green or yellow) he has to go for antibiotic.Sir for past 3 months due to cold climate in bangalore he is repeatedely suffering from cold and cough due to which he has to go for antibiotic. I am confused whether to continue the treatment or to go for Ayurvedic. Many people tell that there is a permanent cure for Allergys with no side effects