My doctor gave me a prescription for librax for esophogeal spasms. My insurance won't pay for it. They claim it's not an FDA approved drug. My doctor says it's been used for 30 to 40 years by many people. Do any of you know if Librax is or isn't approved? I can't imagine a drug being around that long and in use and not being approved by the FDA! I don't trust my insurance and I thought I've read that several people on this board have taken it. I'd appreciate if anyone has any info to let me know!Thanks!