If you shoot up lidocaine patch yourself?

Answer 1

This question is not grammatical; it does not make sense prima facia, but if what you mean is, 'what happens if you take a Lidoderm patch, somehow capture the medication contained in the patch, and then inject it intravenously', then an answer can be generated.

Injecting intravenous lidocaine is done all the time but is typically done in doses of about 1/2 to 1 mg per kilogram. In this dose range it can stabilize rhythms of the ventricular part of the heart, it can produce local anesthesia effects at the venous puncture site (as when given to preceed Propofol), it often produces tinnitus (ringing in the ears) and perioral numbness (as if you have hyperventilated), it can produce mild to moderate sedation of a short acting nature, but it can also produce generalized seizures, although this would be pretty uncommon at less than 1 mg per kg.

A Lidoderm patch, however, contains 700 mg of lidocaine. If you somehow captured enough of it to exceed 1 mg per kg of your body weight and then injected it, you would very likely have the rapid onset of tinnitus, perioral numbness, you would likely become unconscious and you may very well seize. The good news is that provided that you didn't obstruct your airway and otherwise continued to breathe adequately, your ventricular rhythm would remain nice and steady.

Now, why in the heck would you consider doing this? Why not go down to your local store and buy some alcohol instead?