Indeed. With anything, start low and work up. It's not something I'd fancy myself..
ps we're not here to tell you how to get high, only how to do it safely, so be careful what you post - check out the guidelines in my sig. I'd check out erowid for trip reports and dosage info..
I'm not sure what a dangerous dose of ambien/zolpidem is - it is possible to OD especially if you combine it with other downers, although it is not very common, so go steady.