 [ Symptoms ] my 11 month old was prescribed nystatin when he got thrush how should i use it and for how long [ Disease ] an antibiotic will not help the cough it is only for infection however the cough after an illness is usually the longest symptom you have and can last some time if it becomes worse or prolongs more than a month i would ask the md also perhaps they should give him something specific for the cough coughing is always worse at night and if could mean a better night is rest for him if he can not cough so much at night also often a cough is actually good for getting rid of the junk that is in his lungs so he needs to cough some of it up and out i would not worry too much at this point