I have had good results with Dupixent. It’s taken every 2 weeks and so far, it has increased my resting saturation rates from 92-93 to 94-95. It has also helped reduce my heart rate while ambulating so that it stays in a more normal 125 bpm instead of 150+! I’ve only been taking it since late November, but so far, I am pretty satisfied. It does make my knees a bit uncomfortable (a bit tight), which is a potential side effect.