I am going for infusion number two in the morning. I will post a little follow up a couple days later when I know what effect it had. It really was easier than I thought, probably owing to the low dose. I didn't have any problems afterwards. Of course mine are not back to back either.
You can look up dextromethorphan and CRPS. It is obviously not as strong an antagonist as ketamine but is used. The new gazillion dollar drug Nudexta is Dextromethorphan with quinidine to enhance absorption.
I really like the compound I use, it has a nice texture and absorbs well. try different combos. I had one I couldn't stand once, totally sticky and bleh.