Is It Safe For My Child With Asthma And High IgE Levels To Use Comblist Nebulizer And Steroids Like Deflocort Or Omnacortil?

Hi my boy is 12 years old and have asthma problem and ige level 2700 . Dr recommend him comblist l nebulizer and glynium 25mcg . And treatment with steroids deflocort or omnacortil . Is it safe or not... What is safe treatment for my boy plz suggest me right suggestion . I am too much worried