I Have gone over the threads and not sure whether to sleep on an eight hour flight? I'm so concerned about the whole dvt issue? Common sense tells me that if I can get 4-5 hrs of sleep I should but That would require not getting up. What's the verdict? Also would you take n aspirin as a precaution for anyone? Can't hurt? Btw, I'm not at hi risk, in my 40s and in good health . Obviously just not a great flyer.