I've been taking ambien almost everynight for the last 3 years, and I can still feel it everynight. The truth is that the way different people react to ambien varies alot. Some people will always feel great, some people will always fall right asleep, some people will always have a psycotic reaction. Basically you will continue to have the same reaction all the time. As for your body getting used to it and the trippiness going away, thats probably just tolerance setting in. Tolerance goes up dramatically with every dose of ambien, so you'll need to abstain for a little while until your tolerance goes back down. If you want to find prove whether or not you can "trip" off of ambien, dont take any for at least a week, then bump 2 10mg pills without taking anything prior to that.