Welcome to Neuro Talk. Sorry you are having trouble with neurontin. some people just don't tolerate the medication well at all. I am one of those people who tried three times to take the medication. Foggy all the time. Please ask your doctor about it. Also lifting heavy things is most likely something you don't want to do ever after a spinal fusion. I was told not to lift over 10lbs. I do hope you will ask your doctor some questions. ginnie