There is a small percent of people who take the Human Growth Hormone that will experience problems sleeping. There are many people who claim they will sleep better when on HGH, but sleep disturbances is one of the HGH side effects related to HGH releasers and secretagogues. Usually, the sleep disturbances can be attributed to certain supplements that include low- grade speed ingredients, so to speak. You may even be experiencing your sleep disturbances because of more active dreaming, which is actually relatively normal; if this is the case, your sleep habits should return back to normal after the initial occurrence. Just remember that if you have extended sleep problems, and you do not feel rested, you want to consult your doctor.