Thousands! The best way to treat sleep apnea medically is with CPAP and other positive pressure devices. Obviously weight loss is an integral part of medical management as well. Dental appliances that pull the jaw and tongue forward can also be very helpful with many patients. Surgery can work but must be tailored to the patients anatomical obstruction. Thousands successfully use CPAP to rx their apnea.
By prescription only. CPAP machines are used to treat obstructive sleep apnea. They are only available by prescription and are generally about the most effective treatment for osa. The trick is getting the right head-gear that is comfortable for the patient and provides adequate ventilation to properly treat them. So, i guess you could say that docs like them in that they are the ones prescribing them.