Dr. Kadwa please help coughing problem and allergy

My mother having a problem last one year.
She suffering from cough every month. 20 or 25 days gap then again starting. When she read a book or paper she coughing. Or cooking smell , dust specially cement dust, agarbatti smell she start coughing. Couple of times vomiting tendency occurred. Only split out nothing else. Then last month we went to allopathy doctor. He said that it's a allergy cum gas problem. He prescribed levolong m and panido L for one month. After 1 or 2 days coughing problem gone fully. When the medicine stop after 30 days. Then again slowly coughing problem and same thing sl start slowly. She also have cholesterol and high blood pressure. My mother's age 57. Please solve this problem . Thank you.