Started gabapentin 4 weeks ago and I've noticed really severe constipation. The first time I went for 2 weeks. Started vomiting, used an enema and many doses of Milk of Magnesia. Then tried Miralax which did not work, and finally Dulcolax (the one that causes contractions of the bowel) which did. Gabapentin has relieved my neuropathic pain immensely. Thinking of trying Lyrica to see if it won't cause this awful side-effect, but the price... the price! Has anyone else had this problem, and if so how did you address it?