Daz, I reckon all 'asthma sufferers' should post their pre and post salbutamol peak flow rates for public consumption to prove their airways reversability. I'd be happy to show mine. When I was a kid, I suffered the ignominy of never being picked for the playground soccer kick-about coz I was crap. Why? I could not breathe! The scars last a lifetime, hence the nom de forum. I am asthmatic but I run in defiance of it. It has defined my life. Two fingers to the lot of you!!!!!