Hello Doctor, I am suffering from severe nasal allergy since past four-year five years. I have allergy with dust, strong smell , nuts, and sometimes sunlight as well. I usually have running and stuffy nose and heavy sneezing causing teary and eachy eyes. As suggested by a General physician doctor, For instant relief I take Levocet-M which is effective for two to three days. I am looking for permanent cure for this problem. Please help.