I have a sleep disorder not yet mentioned. I was diagnosed in 2008, but my symptoms started in2006 when I came down with a coxsackie (sp?) virus that causes vesicles in the mouthand throat in toddlers called herpangina. Anyway, for the past zeveral months I've been see-sawing between getting 2-3 hours of sleep, usually around early morning alternating with hours (longest was 64, but usually 24-48) of overwhelming need for sleep. I have attributed this to severe sleep deprivation. Has anyone else experienced this? Ihave tried melatonin 3mg, valerian, various compounded sleep aids like SomnaPure, etc. sold on ProHealth.com all without success. I have f.lux on thecomputer, but I use my Kindle HD for mostly because itiseasier inbed. Unfortunately, the comany doesn't make a version for andro I'm very impressed with the level of discussion and scientific backing in this thread and thank you all for your willingness to share.