Each clinic and protocol is different. The only reason they want family with me after is because it's such a high dose protocol as outpatient doses go. I sleep and feel feel out of it for at least two days. The ketamine leaves your system within about an hour but the other drugs they give for nausea, halucinations, etc., and the effects of the ketamine on the brain take a little longer to work through your body. The advice is rest and let your body heal even if you feel "like a new person."

I can't walk out of the clinic on that dose. I can't even walk the rest of the day. They take me down to the car in a wheelchair and it's difficult getting me to the bed once home. I use a cane the next couple or more days. However, I have felt no pain right after the infusion. I usually feel no pain the next day though still out of it. I've felt a bit of a flare for several days after that, especially if I try to do too much but then it usually settles back down into no or little pain. I have other problems from the CRPS such as dysautonomia and edema that the ketamine does not help. But it helps the pain quite significantly for me.

I can't answer your question on standing for 8 hours because I also have POTS and can't stay on my feet for very long no matter what.