Can you take valium and percocet at the same time?

It depends upon your: Dose and whether you have sleep apnea or any other disease that can cause decreased respiratory drive. You must be careful not to drive or operate machinery and all prescribing doctors must be aware all of the meds you are taking. If all of the above are carefully in place, then it may be possible to take them together. Both, of course, are potentially addicting. Best wishes.

You can, but: It's not a good idea. They will both be sedating and cause you to be drowsy. If your physician has prescribed these for you, please ask him/her about the timing of doses. If you do take both, you should definitely not drive.