I take gabapentin for my PAD and it is a great help! A lot of literature says you have to take it for 2 to 3 weeks before you can feel the effects, but I can take one 300 mg dosage in the morning and within a few hours, I can feel my feet again and my legs are not burning and uncomfortable. Depending upon how uncomfortable I am feeling, I might take another dose around 2 o’clock. By the time I’ve hit my second pill, within a few hours I am pain-free for the rest of the day and able to sleep easily. The doctor prescribed two 300 mg capsules three times a day. I felt like a zombie , and adjusted the dose myself to less than half that. To piggyback on another answer, I am 72 years old and have health issues that have recently cropped up and make it hard for me to walk every day. I’m usually able to do a mile and a half/30 minutes at least three times a week. I’m sure it’s helping something , but it did nothing for my neuropathy. I don’t know why because I thought it would have, but that is my situation. Good luck to your friend! It’s a very uncomfortable thing to be saddled with!