I have read so many blogs people have posted saying they are asthmatic so perhaps those who also suffer could post some tips so we can help each other:-
1. Doctor's instructions for me is take two puffs of my Ventolin before I go for a run, also to carry it with me. Common sense perhaps but its not a bad thing to be reminded to carry it.
2. Winter time when the air is very cold (Australians/NZs take note just now) I wear a Buff around my mouth and nose to keep the cold air out until I have got used to it, this really does help.
Hope other asthmatics and runners add to this, we are after all a caring sharing bunch of happy runners