Another thing my doctor said a person needed to have it in their blood stream all the time. I've got 9 ruptured/herniated discs from getting hit by a tree fighting fires 23 years ago. Oh what I would give for pain relief. I had laser surgery on the four worst, but it didn't help. I've tried numerous things, and I'm having to deal with the harassment by Federal Workers Compensation. I've had a couple suggest being put into a ketamine coma, and hopefully the pain signals in my brain would reset. Has anyónehax this done.