My 2 year old son's urine output has reduced a lot from past 2 to 3 days. Earlier we had to change his diaper every 4 to 5 hours otherwise it would leak. Now even after 8 hours his diaper is not even half filled. He has viral fever last week which has been cured but due to cough and chest congestion he is on medication Ambrolite-s 3times a day and tixylix kids cough syrup 3 times a day. Is this one of the side effects of medicines or something else. Do we need to rush to a pediatrician or can wait and watch. He is not eating anything these days...only taking milk and water. Please suggest.