my 8 yrs old son was diagnosed with weak lungs. he's in medication for 6 months using rimaped and comprilex. but he had an asthma attack 2weeks ago and he was confined in a hospital for 5 days the dr. prescribed him with pred10 and solucortef in his IV. when he was released they gave him montelukast 4mg for two weeks. yet he always have a cough in the morning but none in the later hrs of the day.what shall i do ?