Yes, in the past couple of weeks, I have been experiencing severe pain in my middle back whenever I stand for more than a few minutes, or when I walk any distance. I have also recently increased my dosage of gabapentin from 600 mg. at night to 600mg morning, afternnoon and night. I also take .088mg levothyroxine 1x daily and clonazempam.5mg at bedtime. Could the increased dosage of gabapentin be causing the back pain, or should I consult another doctor about it?