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Considering the frequency of asthma attacks you get, you should definitely get medical ID bracelet.. You need not take Ventolin daily. But, currently, you need to continue taking symbicort. Whenever you feel that you are going to get an attack of asthma, start ventolin. You need to stay away from all kinds of allergens like dust, pollution, perfumes etc. Till now, you must have observed that after eating or being in contact with any food or chemical you get an attack of asthma. Please avoid all such materials.
For post nasal drip, you can start tablet azithromycin (1 400 mg tablet once daily for 5 days) and tablet cetrizine (1 tablet after dinner for 1 week).
When you get an attack of asthama, start with ventolin and symbicort. Drink coffee, if you feel like. If you feel that your asthma is aggravating, get hospitalized and get salbutamol nebulization.