Can Gabapentin and methylcobalamin tablets used for pedal edema ? My grandmother was prescribed this medication. I keep saying that this was prescribed for neuropathic pain as she was diagnosed of cervical spondylosis and has severe pain radiating to the arm. She also has grade 2 diastolic heart failure. This tablet was prescribed by that cardiologist and she believes that it is for pedal edema as she feels that edema decreases when taking this tablet.