Dear Pink Lotus,I take 3 mg Lunesta and 1 mg Klonopin at night, with no ill effects except, probably, memory deficit. I know my memory deficit is due to something, and it is probably these 2 meds. However, I don't notice any hangover effect, particularly, when, for whatever reason, I take ONLY the Lunesta. Bear in mind that Lunesta is not particularly effective if taken with or after a meal. I would take it at least 30-45 minutes before eating or wait 2 hours after eating. What you must recognize, however, is that I am unemployed. I did take Ambien CR [alone] when I was still employed, with no ill effects THAT I KNOW OF. I DID have ill effects of some kind during my last year of employment, but I did not trace that to the Ambien as I had taken it much longer than that. With all of that having been said, I have no clue as to what a 5-ton stacker is, but it sounds like a BIG ole truck, and if fate had led me to drive one of those, Pink, you couldn't pay me to take any medications whatsoever. I think you are absolutely right to be fearful of Lunesta or anything else in your situation! Good Luck (musical note) billieJ