CPAP Therapy for Sleep Apnea
CPAP is the most widely prescribed treatment for sleep apnea, and when it fits, it works extremely well. The catch is that it only works on the nights you wear it — and a poorly fitted mask or the wrong settings can make that hard. Here is what CPAP therapy is, how it works, and what it takes to make it work for you.
Reviewed by Thomas D'Acquisto, Sleep Health Director
Last updated October 2026
What Is CPAP Therapy?
CPAP stands for continuous positive airway pressure. A small bedside machine delivers a steady stream of pressurized air through a mask, keeping your airway open so you can breathe normally all night. The American Academy of Sleep Medicine (AASM) recommends positive airway pressure as a standard treatment for adults with obstructive sleep apnea.
CPAP vs. PAP
Clinically, the treatment is called PAP (positive airway pressure) therapy, and CPAP is one mode of it. Most people say “CPAP” for all of them — so do we on this page.
How CPAP Works
In obstructive sleep apnea, the soft tissue in your throat relaxes and collapses during sleep, blocking airflow. CPAP prevents that collapse with air pressure instead of a device in your mouth:
Air pressure splints the airway open
Gentle, steady pressure acts like an air splint, holding the throat open so the tongue and soft palate cannot collapse inward.
A mask delivers the air
Nasal pillows, nasal masks, and full-face masks all connect to the machine through a lightweight hose. The right mask style is the single biggest factor in comfort.
Comfort features smooth the experience
Heated humidification, a ramp that starts at low pressure and builds as you fall asleep, and exhale relief settings all make therapy easier to tolerate.
Types of PAP Therapy
Your sleep physician prescribes the mode and pressure settings based on your sleep study. Most patients start on CPAP or APAP.
CPAP
One fixed pressure, all night. Simple, proven, and the most common starting point.
APAP (Auto-CPAP)
Automatically adjusts pressure within a set range as your needs change with sleep stage and position.
BiPAP
Two pressures: higher when you breathe in, lower when you breathe out. Helpful when high pressures make exhaling hard.
BiPAP ST & ASV
Advanced modes that can deliver backup breaths or adapt breath by breath. Used for central or complex sleep apnea under close physician care.
Who CPAP Is Right For
CPAP can treat sleep apnea at any severity. It is often the strongest choice if you:
- Have severe obstructive sleep apnea and tolerate a mask well
- Have central or complex sleep apnea, which oral appliances cannot treat
- Have dental or jaw conditions that rule out an oral appliance
- Already sleep well with CPAP and feel rested in the morning
If CPAP is working for you, keep using it. If it is not, the answer is usually a better setup or a different treatment — never no treatment.
Get an Honest Read on Your CPAP Options
Founder/Director Thomas D'Acquisto — 40 years in sleep medicine — will personally call you at a time that works. No office visit. No obligation.
Most insurance and Medicare accepted · No doctor referral needed · 100% free, no obligation
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Getting Started on CPAP
The first 90 days set the tone. Here is what good CPAP care looks like from diagnosis onward:
Diagnosis & Prescription
A sleep study confirms your diagnosis and severity. Many patients can test at home. Your physician then prescribes the PAP mode and pressure settings.
Equipment & Mask Fitting
A durable medical equipment (DME) supplier provides your machine and fits your mask. Ask to try more than one style — fit is what makes or breaks comfort.
The First 30 Days
Your machine records usage, leak, and remaining apnea events. That data should be reviewed early so mask or pressure problems get fixed before they become habits.
Meeting Compliance
Medicare and many insurers require at least 4 hours a night on 70% of nights during a 30-day stretch in the first 90 days to keep covering your equipment.
Ongoing Supplies & Follow-Up
Masks, cushions, filters, and tubing wear out and are typically covered for regular replacement. A worn cushion is one of the most common causes of new leaks.
Need a sleep study first? Learn about the home sleep test process — you can complete it in your own bed.
Common CPAP Problems (Most Are Fixable)
Roughly half of patients struggle to stay on CPAP, but many of the reasons are equipment and setup issues, not the therapy itself:
Problem → Usual fix
Mask leaks or marks on your face
Refit, try a different size or style, or replace a worn cushion.
Dry mouth, nose, or throat
Adjust heated humidification; consider a chin strap or full-face mask for mouth breathers.
Pressure feels too strong
Ramp, exhale relief, or a switch to APAP or BiPAP can make breathing out easier.
Feeling claustrophobic
Minimal-contact nasal pillows and short daytime practice sessions help many patients adapt.
Bloating or swallowing air
Often a pressure issue your physician can adjust.
Many of these come down to your equipment supplier. Our guide to getting real support from your DME company covers what they owe you and what to ask for.
Don’t just stop using it
Untreated sleep apnea raises the risk of high blood pressure, heart disease, and stroke. If CPAP is not working, make a plan for what comes next before you put it away. Read more on whether it’s safe to stop using CPAP.
When to Consider an Alternative
If you have given CPAP a genuine try — with a proper mask fit and adjusted settings — and still cannot use it most nights, you have proven options. For mild-to-moderate obstructive sleep apnea, the AASM recommends oral appliance therapy as a first-line treatment, and as an alternative for severe cases when CPAP fails. Thomas D’Acquisto spent years running a CPAP-focused company before building this network, so you will get a straight answer on whether to fix your CPAP or move on from it.
Call or text +1 (888) 885-7369 for a free consultation.