Can you mix benzocaine with crack cocaine?

That's called "speedballing". Extremely dangerous, because you have 50% chance of your heart stopping suddenly.

^This guy is wrong. Speedballing is when you mix meth with heroin. Mixing cocaine and meth will put more of a strain on your heart and increase the risk of heart attack, especially if you have a history of heart problems. However, chances are that you will survive as long as you don't over do it.

^that's not necessarily true... im from middle Georgia and ive always heard meth and coke mixed referred to as speedballing... so i guess it really depends on the culture ur from determining whether or not its meth or heroine...