Numerous treatment options are used in obstructive sleep apnea. Avoiding alcohol and smoking is recommended, as is avoiding medications that relax the central nervous system. Weight loss is recommended in those who are overweight. Continuous positive airway pressure (CPAP) and mandibular advancement devices are often used and found to be equally effective. Physical training, even without weight loss, improves sleep apnea. There is insufficient evidence to support widespread use of medications or surgery.