Percocet contains oxycodone, a Schedule II controlled substance. As an opioid, Percocet exposes users to the risks of addiction, abuse, and misuse [see DRUG ABUSE AND DEPENDENCE]. Although the risk of addiction in any individual is unknown, it can occur in patients appropriately prescribed Percocet.
Use a waterpik! It is a miracle for cleaning under the gumline and in between teeth. You'll actually smell that awful smell coming out, but do it 2x a day and it'll fix that kind of odor. Don't forget, it doesn't replace flossing. All pharmacies and walmart, etc sell them.
Other items that can change the odor and taste include if you sleep with your mouth open (drying out your mouth). Mouth breathers always find that their breath is more odorous in the morning. There are other medical conditions that can cause you to have different tastes and odors in your mouth.