Sleep Apnea Depression. If you're asking which one it is, sleep apnea or depression, you're in good company: unfortunately, primary care physicians, psychiatrists, psychologists and patients often confuse sleep apnea and depression. Understandably so. Loss of energy, loss of interest in once enjoyable things, difficulty concentrating and fatigue are common symptoms of depression. But they are also common symptoms of sleep apnea, and new research is continually emerging to show… Continue