I am a 70 year old lady who has been on tramadol for many years , along with Gabapentin 600 mg. I have a new doctor and he took me off of tramadol and told me to increase the 650mg Tylenol to 2 3 times a day. I was taking it 2 times a day . I have peripheral neuropathy in my legs and feet and now my hands. I am in so much pain now I can hardly stand it. My question is this. My doctor said he could increase the gabapentin it I needed it. How much can I take without causing increased side effects?