I am a doc and allow me to explain my situation to you as I have already lived it. I am not saying 100% that your issue is completely the same as mine as I have no way of knowing your complete history. I was a healthy and power lifted most of my life, but at 42 had to deal with a gallbladder removal that led to severe complications and the diagnosis of a rare biliary disease which further led to weight gain, decreased ability exercise , and hormone/pituitary issues and the beginning of a nightmare for me. With that being said, after the weight gain, I developed abnormal sleep issues, but was dismissed by my doctors. At the same time, I was diagnosed with secondary hypogandism and began TRT. The sleep situation gradually got much worse but was still ignored by my docs until I told them that if they did not prescribe a sleep study, I would do it myself. By this point, I was in heart failure, Blood pressure was 200/120, developed Orthopnea ( can never lay flat or sleep in a bed), developed an aneurysm in my leg after a cardiac cath, and was also given a diagnosis of primary pulmonary hypertension due to untreated severe sleep apnea that was ignored by the pulmonologist for months. This all started after beginning TRT. Here is the issue, Many of us who deal with suboptimal levels of testosterone put on weight which can lead to worsening of underlying mild and undiagnosed sleep apnea. As our sleep continues to worsen over time, we start the see the effects on the cardiovascular, pulmonary, and hormonal systems. When testosterone becomes an issue, either because obesity secondarily decreases levels or because there is a defect in the HPA axis with its pituitary effects on hormone production, we develop a need for supplementation just to function somewhat normally and to preserve proper heart function; however, testosterone use also causes proliferation of the muscular portion of the posterior pharynx ultimately leading to more obstruction of the airway while sleeping. This can be a mechanism for worse sleep, hypoxia, and premature waking along with day time fatigue. Central sleep apnea and mixed sleep apnea syndrome are problems all of their own and are very complex. Therefore, testosterone supplemetion may provide you with extra energy, ;however, I do not believe it is enough to alter sleep unless there are other comorbid hormone issues. More than likely, and in many cases of sleep abnormalities, TRT causes issues becuase it worsens an underlying undiagnosed sleep apnea that needs an in lab sleep study to diagnose. In my case, I stopped breathing 125 times an hour. I was put on a cpap and screamed at the doctors telling them I was getting worse. I would wake up in a panic after falling asleep in a chair. I would abruptly wake gasping for air and run around the house trying to breath even with the use of the cpap. Being a physician, doesnt make a difference to anyone. I was ignored until I demanded a sleep titration with the cpap. It was found that the cpap made my issues worse and a bipap was needed as I figured. People with heart failure can get worse on a cpap because the very high constant inhalatory and expiratory pressures. A bipap has a lower expiratory pressure and the heart and lungs do not have to work as hard to expel CO2. There are also other hormonal feedback pathways by which testosterone can affect sleep, but I would be concerned about undiagnosed sleep apnea which should not be ignored in any case. As a side note, many of us that suffer form hypogonadism have a secondary iron deficiency and the bisglycinate form is one of the best for absorption and easiest on the stomach because it is chelated to the amino acid glycine, but levels of serum iron , ferritin, and total iron binding capacity need to be very carefully monitored especially if there is a concern for a secondary polycythemia. Pharmaceutical grade third party tested glycine supplements shown promise in improving sleep also.