Thanks for writing to health care magic.
We normally advise prednisolone
when we think in terms of bronchial asthma
to be the cause of cough.
We treat with this drug for a short duration only for a period varying between 3 to 5 days. So there will be no significant side effects. Long term therapy is associated with significant side effects.
Since in a case of bronchial asthma the advantages out weigh the disadvantages we start such therapy.
If it is a case of upper respiratory infection steroids
are not indicated. Steroids are in fact contraindicated in URTI
Hope this helps.