The itching to me is probably from the alcohol numbing your feeling sensations and now its rebounding. Seems to be something with the ion or calcium voltage controlled gates. Similar to the way Gabapentin works. When i miss a dose i itch like crazy especially my eye's. But the rest i seem to not even be able to handle my own hair itching me. It normally takes about a week to subside but im not sure about alcohol. Hope you get it figured out. I would definitely check with your Dr.