I think the order goes like this (someone correct me if I'm wrong) -
Eating - 50% effective
Snorting - 60% effective
Up your ass - 90% effective
Injecting (which you won't be doing with that) - 100%
So it sounds like you want to give yourself an ambien enema if you want it to kick in a little faster. This might be easier if you have someone help you. I'm sure you could crush it up, mix with some water, use a funnel so it all gets in there, shove a buttplug in your ass, and jump around for a few minutes so it's good and stirred up.
Or you could do like most normal people do, which would be to take it as perscribed by your physician, which would mean SWALLOWING THE PILL.
Since I'm not a doctor or a pharmacist, I recommend you follow the instructions on the bottle for proper use. If you decide to shove it up your ass, I am in no way responsible for what happens or any embarassment you may suffer as a result of giving yourself an ambien enema, nor am I responsible for any furnature or carpeting you may stain in your house as a result of your ambien enema leaking.
Have a nice night!
