I have just received mine and every time I try to use it, I get cramps in my toes and muscle twitching in my legs. At first, I could only use it for about 15 minutes. After 3 days, I’m up to about 40 minutes, but I do not fall asleep and I can’t keep using it after the twitching starts. Once I turn off the machine, it takes about half an hour before the twitching subsides.
My provider is very supportive. She’s changed the settings twice and I’ve noticed some improvement. I have a ResMed VPAP ST.

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