Why CBD oil over pain pills? I have small fiber peripheral nephropathy (SFPN) in my feet and the pain is really, really bad. I take pain pills that work great and they are cheap. I pay less than $10 a month. I tried CBD oil a couple of times and it seemed to work but it was expensive. I paid $70 for 4 or 5 ounces. I figured I would need multiple bottles a month. The SFPN forced me to "retire" early and my disposable income is way less than it used to be. So for financial reasons I take the pain pills.