I was taking 600 mg of Gabapentin a day...(I had a spinal cord injury from degeneration)..And while I don’t believe I’ve experienced any memory loss........I did experience water retention and swelling in both of my legs. When I complained to my doctors and their nurses, they didn’t believe it was coming from the gabapentin. They thought my swelling was due to either too much sodium or other reasons… (I’ve never had swelling in my life for any reason) Anyway, I weaned myself off of the gabapentin over the course of two weeks, and as of now I wake up every day with absolutely no swelling in my legs or my feet. So, don’t be surprised if you eventually have swelling and take it from me it’s most likely due to the Gabapentin.