Hi, I am new to this forum, so if this is common please accept my appologies, I had a medical at work and the spiromiter test showed that i had problems, i was told it could be copd and was given a letter to give to my gp. my gp arranged for another set of tests before and after taking sabutimol it showed a very slight improvment, and so my gp said it was asthma. I have since had another test at work after taking a preventer for 3 weeks and the improvment is still very small in comparison with the first test. The nurse at work said she would expect more of an improvment and so i have to see the company doctor again. does anyone know how much of an improvment i should see if it is asthma. Thanks in advance for any replies.