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tried these before. the problem seems to be that, i don't nap, or go to bed earlier, i.e. adjust to the local time zone, eat the appropriate meal, all the usual suggestions. i go to bed at the local bed-time, feeling very sleepy and within half an hour or so of getting into bed, i feel completely wired, the same feeling you get after drinking too much coffee. i never drink alcohol, or caffeinated drinks on board, always drink loads of water, walk about on board all the usual recommended things but every time it is the same. i have tried herbal sleeping tablets to no avail. i am almost beginning to believe that for me there is no solution. i worked nights on and off for a few years and never found anything to help me to sleep when my body thought it should be awake.