Advair is a medicine that if used properly, or exactly as prescribed by your doctor, can greatly improve your asthma.  It has worked miracles for many asthmatics, including myself.  So long as you use this medicine PROPERLY, and you pay attention to your signs and symptoms of asthma, and follow your asthma action plan to a tee, this medicine is safe.

I think the reason this medicine gets such a bad rap is some asthmatics rely on it too much, and don't pay attention to their early warning signs of asthma, and wait too long to call for help. 

Still you'll want to be alert of posible side effects of any new medicine you take, especially withing the first 2 weeks.  As with any medicine, you and your doctor will have to weigh posible side effects with benefits.  As your doctor prescribed this medicine, he believes it's safe and may also benefit you. 

Consider this my opinion.  If you continue to have concerns, you should call your doctor. 

For more information, you should check out this link.