I've been taking this for 9 days now and just had a relapse. This was rx'd to help my walking and instead I can barely walk. Has anyone been on this before and have any "light at the end of the tunnel" stories? I want to stop it just in case it's what's caused me to relapse, but they want me to stay on it for four weeks and see if it works... should I? They don't know about my relapse yet since it's the weekend but I guess they'll tell me how to proceed tomorrow when I call.