For lower back pain which might be related to kidneys overtaxed by the toxins, try Banaba tea. It's great at relieving pain, treating inflammation and infection, and kidney stones. It's also used for treating diabetes and is in the market in Japan for weight loss.
Here's a link which gives lots of information (first hand experiences and links) about Banaba tea, including a link to a cheap source of Banaba tea (the shipping is cheap too):