I'm hoping someone can help me here. A friend has started her child on Pulmozyme. This drug has never been mentioned at clinic visits. I looked it up online (Pulmozyme's official website) and it says it is used to increase FEV1 and keep away resp. infections. My son has never really been sick and is too young for any tests besides radiographs. I do like the fact that it says it keeps away resp. infections. My concern is the website also says that they have done very limited studies in children under 5 and it also has not been studied for long term use. How many of you have young children using this? My son is 9 months old. Thanks for your help!