Brian~ Yes,trust me, there is legal cocaine. It does not come in the form of white powder,however. :) I'll send you a PM...
It's not likely. It could be one of the other "caines": Marcaine,Lidocaine, etc...anesthetics like Novacaine that you get at the dentist. Pharmeceutical grade cocaine is used medically but more for nose,throat surgeries.
No...they don't have cocaine in them. They are normally steroid injections or cortisone injections.
There is no such thing as legal cocaine shot administered by a doctor.