I have an inhaler I use called Flonaise. Plus I take an over the counter allergy pill called Sudafed PE as needed. I mainly get stuffed up and itchy eyes. The coughing I get is due to my asthma and not any allergens in the air.
I get a lot of strange looks and people move sideways when I start having a coughing fit, until I pull out the Ventolin inhaler.