I have been on Baclofen, 20mg 3 times a day, for over 2 years. I decided to take myself off it to see if it was working. WRONG. The next day I felt like I had worms crawling all under my skin due to the muscle spasms. It took 2 days before the effects kicked back in for me.
Everyone is different. I am allergic to most narcotics and have severe reactions to them, Like my heart stops beating. That is a hard way to discover you are allergic to something.
My advice is check back with the Doctor and let them know about the side effects and see what they recommend.