Hello, I am 30 years old and have been taking Advair to control my asthma for about 11 years. It's worked wonders and I feel my asthma is in control. I recently moved to a new city and saw a new doctor who wanted to switch me to singulair. He did not really give a reason other than Singulair is preventive whereas Advair just treats the symptoms. I am skeptical because I really see no reason to change from what has been working for over a decade. However, I am not too educated on the differences between all these medicines, I have basically just taken what my doctor prescribes. So, obviously, I also want to trust the doctor. Advice? Should I switch and trust the doctor, or go back to him and ask to stay on Advair, third option? Thank you for your time.