I have severe spasms in my back, because of fibromyalgia, advanced osteo-arthritis, deformity of joints in neck region. Baclofen relieved nearly 80 percent of all my spasms; I no longer draw to one side; my head no longer rests on one shoulder or another. While I may feel a pull in the lumbar regions, it isn't enough to cause me to visit the physical therapist or to seek injections to remove the cramping.
I endorse Baclofen.