Doping

Is anyone an asthmatic that races here ? Do you have to reach for an inhaler when racing ?
I wondered why with all the asthmatics in cycling, why aren't they reaching for the inhaler when going full gas up a mountain top finish at altitude, or doesn't exercise induced asthma work in that way ?

To answer you questions in order:
Yes
No, I take it before I start
It does, but the drugs last long enough that you can take them prophylactically. In a long stage, if you're using a short acting reliever, you may have to dose mid-stage.

The problem for Yates seems to have been that he joined an Aussie team - antipodean doctors seem much keener on terbutaline than UK ones, where salbutamol is the first choice and you have to fail to thrive on that to even get to know about alternatives. The long-acting option of first resort in the UK is salmeterol. Neither salbutamol nor salmeterol needs a TUE when used in the normal therapeutic doses required by somebody who is not too ill to ride.