I would agree with Loxie that drugs such as amitriptyline and Gabapentin are not roads anyone should really go down without a lot of thought. Gaba is used a lot for neuropathic pain and works by damping down the pain receptors - which results in the pain receptors struggling to work harder to get the message across so you need a higher dose to dampen them down again (this is the simplified version of what I understand anyway!) . I’ve heard it’s a nightmare to withdraw from if you take it then decide you want to stop it, mainly because your pain receptors will be shrieking out for it.
Amitriptyline is actually an antidepressant but I do know of some people who take tiny doses for pain. Chris posted earlier about CBD oil saying s/he’d heard of a guy who said it did nothing. I’ve heard from many people (including my husband) saying it works really well. I think it depends a lot on the quality, strength and dose. I believe it takes two or three weeks before you begin to feel any benefit. My husband says it lets him forget about the pain (from MS) and he sleeps better. It might be worth some investigation as it doesn’t come with the withdrawal problems of some pharma drugs.