Complete absence of sleep over 3.5 years. It began after taking Famvir and further burning on top of the head. It does not help - tryptophan, glycine sometimes it helps - melatonin little help - niacin helps - zopiclone (1/4 tablet). Without it begins to burn the surface of the head to the middle of the night. Poor quality of sleep aggravates the disease. Recoverable if the nervous system after prolonged lack of sleep? Advice ?