It may be coincidence but I had a strange reaction to Serevent yesterday. I just switched back to Spiriva and was also given Serevent so yesterday would have been the third time I used Serevent. When I used it, it I got a sensation like something went down the wrong tube much like when you are swallowing something and it goes down the wrong tube except with the Serevent it is supposed to get sucked into your lungs. Right after I started coughing much more that I ever have in the past and later in the day my throat also got sore but not where it generally does when you get a cold but further down. This morning when I got up I am so hoarse I can hardly talk and feel raw down the centre of my chest and again have a much worse cough than usual. I would have never connected it to Serevent except for the fact that like I said it seemed like something went down the wrong tube and my problems started immediately after taking the Serevent. I don't have any other symptoms of a cold either so really don't think that is the problem.
Just wondered if anyone else has a similar experience with Serevent or might have other suggestions.