Ketamine infusions are typically much more effective than lidocaine infusions, but not without side effects and very costly over time. The down side of both is that boosters are needed.

If your physicians are limited in treatment options for CRPS maybe it is time for a second opinion. Please consider tDCS. It is completely non-invasive, is highly successful in treating many forms of chronic pain, including CRPS. There are only minor side effects that are not long lasting. tDCS treatments also require boosters but the cost is much cheaper. Many time the results are better than Ketamine infusions. Please mention this to your physician. If he does not know about the treatments please do your own independent research to educate yourself to add to your already excellent advocacy skills.