SnoreRx is not designed to treat or prevent sleep apnea. This mouthguard is made purely for reducing and preventing snoring, and it has FDA approval for that purpose only.
The manufacturer of SnoreRx makes it clear that you should not use this device for the purpose of alleviating sleep apnea. They clearly state that SnoreRX shouldn’t be used by anyone who has central sleep apnea.
Even though snoring may be a symptom of sleep apnea, speak with your doctor for a diagnosis and treatment recommendation.