hi my friend can not walk, he has not been diagnose with really any thing, what I see is he lost 55 lbs in 4 months, weak , lethargic, falls down , foot PAIN, numb, weak extremeties,,swelling legs, sensitive, skin deteriation,flaking, ,,has justgiven gabapentin 100 mg, he is a smoker , n is a moderate drinker, drs want endoscopy?, colonoscopy, good where do you go from here,,,,,