I read on a Russian-language forum about only one experience of using lidocaine for fibromyalgia, she was injected with lidocaine in the most painful points. The effect was short-lived. Lidocaine is a local anesthetic that blocks signal transmission from neurons. By the way, lidocaine injections into a vein are also used for cardiac arrhythmia and are successfully treated, but this is strictly according to the doctor's prescription and supervision. Lidocaine leads to anaphylactic shock to a lesser extent than novocaine. But if you have not had novocaine injections before, then before using lidocaine, you need to do a lidocaine test on your skin to determine if you have an allergic reaction.