Read this very carefully and you will get the desired answer for your son.
ASTHMA :Airways hyperresponsiveness that is secondary to inflammatory airways disease
that results in recurrent or chronic episodes of WHEEZE, SHORTNESS of BREATH(SOB0, CHEST TIGHTNESS
&/or COUGH particularly at night or in the early morning ( your son is having all these symptoms including hoarseness
of voice , may be due to laryngeal edema
( side effect of prednisolone
or inflammation of larynx).
Pollen , dust ( fine dusting powder) mist , molds ,pests ( cockroaches ) , fumes , smoking ( active and passive ) , sudden chance of temperature ( increase or decrease ) , as all these are predisposing factors which triggers asthmatic attack.
If possible avoid these .
When such patient visit my clinic I prescribe Montelukast+bambuterole tablet once or twice in day . dosage are 0.2 mg of / kg body weight of each tablet .
Hot coffee and steam inhalation provide instant relief as these acts as bronchodilators.
I never prescribe PREDNISOLONE my patient .This is only meant for serious cases .