Do not use if you are under the age of 18, have loose teeth,
loose crowns, braces, sore or painful teeth, recent implants,
sore gums, oral infections, periodontal disease,
jaw soreness or history of jaw pain or TMJ.
No. At least, not legally. Even if you are diagnosed with sleep apnea, a CPAP may not be what you need. You can find used CPAP machines but this is not recommended. A prescription is needed to acquire a CPAP.