In many cases, medical devices or treatments like masks for sleep apnea are regulated by government agencies like the FDA in the United States. This means they are only available with a prescription from a licensed healthcare provider, who can ensure that the device is appropriate for the patient's needs and medical history. These masks are expensive, so getting the best prescription discount card is better. This is done to help ensure patient safety and prevent medical device misuse, which can have serious health consequences. It also allows healthcare providers to monitor the patient's progress and adjust treatment plans as needed.