I had the spinal tap after lesions were found in my brain. I was more nervous than anything. I had a slow drip so it took longer than normal. Afterwards I went right home and went to sleep. I drank a pepsi for caffeine and took 2 ibuprofen on my way home. I slept until the next morning and felt normal. I wouldn't do one unless you have to. MS is an exclusionary disease. So if they can't diagnose anything without a spinal tap then maybe revisit it. Goodluck