What would happen if i used too much emla (lidocaine and prilocaine)?

EMLA (lidocaine and prilocaine): Too much of anything is not good. There is a possibility of toxicity depending on the mount you used and the total area of aplication.

Methemoglobinemia: Too much Emla (lidocaine and prilocaine) could possibly cause methemoglobinemia which is a condition where the blood does not carry oxygen as it should. This is serious and life threatening, .