My sister has asthma

My sister has asthma . We have tried many different medicines and treatments. We are advised to find one pill, I have the name but I don't know where to find it. I googled them and could not find them in the public domain . Maybe they are sold on prescription?
All I can tell you from experience is that you should definitely take her to swimming. Pills can't be useful without proper breathing and development of her lungs. My opinion is that sports, a healthy lifestyle and a healthy diet can help your sister to improve her situation. Regarding medication, I suggest you start using this drug guide At least I can find everything I need to know there.