What you need first and foremost here is a proper diagnosis. It does not sound as if your son has asthma. He has the symptoms of whooping cough now and this has been going on for almost 3 months. The old name for whooping cough was 'The hundred day cough' so this is perfectly possible. This kind of cough is difficult to stop, but it is worthwhile trying Aterax syrup 2.5ml at night.Your son must be seen and treated by a paediatric allergist or pulmonologist. If you let me know in which region you live I will recommend an expert in your area.Once he is well again his development should catch up.
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