I am a poor airplane sleeper and will be flying EWR to DUB. Flight time is 6 hr 15 mn and I assume that is gate to gate. Even with an Express dinner in business class, my guess is from pill pop to wake up would be at best a little over 4 hours. Is that too short of a time to take an ambien? I assume after wake-up I'll have at least an hour before deplaning so total time to get the pill out of my system will exceed 5 hours. I do not want to be impaired when I arrive.

Other than ambien, any suggestions. I've used it with good results on 8 hour and longer flights but never on one this short.