I'm off the medicine like 95% of the time. When my foot starts to hurt again, I take the meds, wait 24 hours, it significantly improves after a full day passes, and then it completely gets better within another 24-48 hours. Then I quit the meds until it comes back, which can be anywhere from weeks to months later. It's a freaking miracle drug. Nothing else I tried could touch the problem. I gained 20 pounds because I went all those months struggling to walk, so I just sat on the couch except for very essential things. I was so thrilled when the doctor found something that worked for me, after various failures.
When my back gets all better, I plan to exercise the 20 pounds back off.