Asthma, allergic rhinits

Patient: My daughter is 5 year old.She has asthma , allergic rhinitis, itchy eyes, dry skin patches. She is on anti histamine for the whole year.Is it safe for her? I couldn’t get the proper treatment regime. she could attend school regularly. What can be done?

Symptoms: Coughing,sneezing, red itchy eyes,itchy dry skin patches