I only had tiny quick Lidcocaine or Procaine injections in my back, like E3178, in conjunction with some of my acupuncture - neither worked for me. This is called Neuraltherapie in Germany, an alternative therapy, maybe comparable to LDN and other low dose therapies of otherwise pretty potent meds, in this case using procaine or lidocaine or similar.
This is something totally different to infusions , which have been used for chronic pain, incl. fibromyalgia: Kandil et al, 2017 Lidocaine Infusion: A Promising Therapeutic Approach for Chronic Pain
For fibromyalgia, according to a study from 2009 (Schafranski et al) also reported in this link, you get “IV lidocaine 2–5 mg/kg 2 h. Five sequential intravenous 2% lidocaine infusions with rising dosages (2–5 mg/kg, days 1–5)”.
They are called an alternative to opioids and typically used when these do not work. So that’d be pretty high up the therapeutic ladder nowadays, unless that’s now changed due to opioids being taken out more.
The following links to a (albeit short-term) patient experience that contends any euphoria that you have nothing to lose: What It’s Like to Get a Lidocaine Infusion — Pain News Network. You can read other patient experiences on Pain Concern on health unlocked, e.g. Lidocaine infusion experience: Mornin' all... - Pain Concern (in this case not successful).
Lidocaine is a local anaesthetic. Its side effects are enough, but more limited if injected in the periphery of the body, but injected i.v./infused it can affect i.e. do similar things to central parts of the body like the heart or brain. During and after the infusions you are monitored very closely - not necessarily comforting. Doesn’t sound funny or easy at all to me…
(Yes, I could have started a new thread on this topic… but heck, why not stick to an old one if it’s there and the only one… And maybe SK’ll see this and can give any update or comment.)