Has anyone here tried Low Dose Naltrexone (1.5 to 4.5 mg)? Looks like it is gaining popularity for treatment of fibromyalgia, neuropathy and other chronic pain syndromes. Sounds interesting. Also, supposedly increases endorphin response, thus improving mood. I'm not taking any drugs at the moment, but pain at night is starting to affect my sleep. Thought I might try this first, since it has very low side effects (at such a low dose).