As an asthma sufferer since I was young (no, really!), I can tell you that a serious doctor does not prescribe oral steroids these days as the first line treatment. They prescribe inhaled steroids, mixed with a long acting beta2-agonist.
For those non-asthmatics, the beta2-agonist is a medium-term action compound which performs similarly to salbutermol (eg. Ventolin), which acts within seconds to relieve most acute asthma symptoms. The inhaled steroids of choice these days are not prednisone or prednisolone, which are taken in tablet form, but something like fluticasone, which also has steroidal actions.
However, the difference between prednisone and other asthma steroid-based medications these days is that prednisone is not usually available in an inhaled formulation, but is a tablet.
Inhaled asthma steriods and beta2-agonists are the preferred first treatment of ALL honest and qualifed medical practitioners (except when a patient presents with potentially life-threatening symptoms), because the inhaled drugs go straight to the source of the problem - the lungs - and because inhaled steriods do not have very much proliferation into the bloodstream and therefore the rest of the body. That is, they do not have systemic steroidal effects.
Conversely, tablet-based steroids, such as prednisone/prednisolone by their nature proliferate through the bloodstream, into the lungs as well as everywhere else and produce their "lovely" effects bodywide.
Any doctor with any amount of continuing education conducted within the past 30 years would know all of this and, if their desire was to treat an acute asthma attack (unless it was so severe that the patient was being transported to hospital in an ambulance), they would first ask the patient to inhale the maximum recommended dose of Ventolin. If their condition was deemed a risk of persisting, they would then prescribe a high dose of inhaled preventer medication, such as Seretide.
If the patient was still in distress after that treatment, they would typically recommend that they be transported to hospital, given oxygen and oral prednisone.
However, were I wanting to ensure a systemic steroidal treatment for an asthma attack, rather than the most modern and recommended treatment for a severe reaction (ie. inhaled steroids), then I would do what Sky's doctors did, and ask the UCI for permission to give the Dawg a dose of the roids.
If it looks like a rose, but stinks like a corpse, then someone's having you on.