My sister has MS and she takes Gabapentin 100mg and seven other medications. However, her feet are swollen and ankles. Recently, she started complainting about going to the bathroom 20 times at night. Our older sister was taken Gabapentin and couldn't walk for months because of swollen feet and it affected her kidney. Her son read up on the side effect and told her doctor and after she stopped taking Gabapentin she was able to walk again. Should my sister with MS continue to take this medicine?