Just thought I'd throw in my 2 cents for what it's worth. I've been on Gabapentin for quite a few years. For the past few years I'm on 300mg 4 to 5 times a day. I've never experienced tremors from this med or from MS up to this point. I've never heard of tremors causing blood in the urine though. So, even though you don't have a UTI or signs or symptoms of kidney stones/infection, I'm glad you're getting the fact that you have blood in your urine checked out further. Hope the tremors are getting better for you and everything turns/ed out OK with your visit to your PCP.