I recently (4 weeks ago) changed to a different CPAPmachine. I have noticed periodic episodes of vertigo when I get up in the morning. In browsing the web, I ve come across other CPAP users who experience this same problem and have a variety of fixes , some more effective than others. I also noted there are certain medications which can cause light headedness and/or vertigo. This morning it was room spinning type vertigo for 3-4 minutes. I am on Cymbalta, Wellbutrin, Amlodipine and Lisinopril, but have not noticed the vertigo until recently. Any information would be helpful. Thanks!