I was already diagnosed with polyneuropathy when my doctor recommended Shingrix. I had an extreme reaction to the first vaccine 4 days later, including worsened neuropathy, visual problems, blood pressure spikes, palpitations and gut problems. Some of these issues continued for over two months afterwards. Neuropathy is still exacerbated. My doctor recommended I see a psychiatrist. Instead, I found another doctor and filed an adverse event report with the CDC.