I m unusually healthy for my age, and still employed at (nearly) 83. I cycle 8 miles to work (el-assisted bike), and work as a Night Porter. However, I seem to have got increasingly sleepy over the last year or so, and can fall asleep - almost as if I ve passed out. My Thyroid has been mentioned, but from what I ve Googled, I don t really think it s theproblem. My Heart has been checked, and in good shape, I don t have Asthma or Hay Fever. I don t smoke. I enjoy my food, but have a very steady food regime. Sleepiness seems to be the only real problem I m having,k and it makes me feel as if I m sleeping my life away.