My daughter is about 3 and 1/2 year old and she has been diagnosed as suffering from had? how long she have to take medicine? she is using puff

See below: I think you mean asthma or reactive airway disease. It is hard to tell how long she will need to be on medications. A lot of children will outgrow the problem. However, time will tell.

Asthma goes away: Many cases of asthma remit with adulthood, depending on the cause. She will need to take medication as long as her bronchial tubes continue being reactive and narrowing. Please see national heart and lung institute webpage on this subject: <http://www.Nhlbi.Nih.Gov/health/health-topics/topics/asthma/diagnosis.Html >.