magnapak-magnetic-mattress-hea… — A survey of patients who had rheumatoid arthritis, osteoarthritis, or fibromyalgia who were seen by rheumatologists reported that 18 percent had used magnets or copper bracelets, and that this was the second-most-used therapy by these patients, after chiropractic. Call 1-800-361-1387 for recommendations for your pain control.