Injecting no-adrenaline (noepinephrine) with an anaesthetic could help keep you awake while on it.I was told by a dentist epinephrine is mixed with anesthetic to increase the length of time the...
"Inject" is a verb and is defined as: drive or force (a liquid, esp. a drug or vaccine) into a person or animal's body with a syringe or similar device
It's not a good idea. A cold water extraction doesn't yield very high levels of hydrocodone/oxycodone, so you probably wouldn't even get a rush. Plus, you COULD be injecting binders/waxes in the pill...