Anyone tried Lidocaine/Lignocaine infusions?

Has anyone tried Lidocaine (Lignocaine in the UK) infusions?

My doctor is trying to persuade me to have this done to control my terrible EM. His latest idea is to book me in for a session on Wednesday! I am very worried that the effects will be the same as the patches and cause worsening of my pain.

If people can let me know what their experiences have been, it would help me decide whether to go ahead or not. Thank you!