I was put on Cpap with an AHI of 5.9..... overtime with no results as I was still napping daily. after a year my sleep dr started me on Sunosi 75mg with best results. it's my little magic yellow pill. I now have energy, no naps and don't feel exhausted. look for a coupon card online as its very expensive. I recently had an inpatient sleep study done that showed an AHI of 16.9. still waiting for replacement of my recalled machine but am using the full mask and an extra filter where the hose attaches to machine.