My 4 year old is fine all day and coughs violently in the evening, Asthma Allergy Muscle problem nee

My 4 year old son is only here every other weekend and since the beggining of the year he seems to be sick runny nose or cough every time. This past weekend he was fine all day long ,out running ,playing ,jumping on the trampoline. But in the evening usually arround dinner time when they start to relax and unwind for bed he starts cough violently. I tried cough expectorant's and 3 hours later he stil can't sleep because the coughing wont stop. I even tried benadryl thinking he may have an allergy, thta just seemed to help him sleep a bit better but he still coughed. He has been to the doctor 3 times this year for colds that didn't go away and they haven't seemed to be able to help him. Should I be looking at this from another view...maybe an allergy or even asthma? He has only ever had one bad cold that turned into bronchitis when he was 2. It seems to have happened all at once Since the end of the winter. I'm divorced and getting my ex to accept someting is wrong is difficult!

My three year old has the same problem. the doctor gave us singular and the cough stopped the next day. Singular is used for asthma and alegies. It is considered a brocondialtor.

check with your doctor.

Long-term control of reversible airway obstruction caused by asthma or COPD

鈥? Increases diaphragmatic contractility

鈥? Unlabelled Uses: 鈥? Respiratory and myocardial stimulant in premature infant apnea (apnea of prematurity)