I have taken it without any taste side effects...that's weird. I would try the mentos if you like them. My Mom had the same metal taste when she was on chemo and gum helped her. On the MS I would seek as 2nd opinion. My daughter at 19 had her first incident 2 years ago. Her right side became completely paralized and was confined to a wheel chair. With therapy she is 99% back to normal and you wouldn't know what she went through. The Dr. put her right on the Copaxone 2 weeks after discharge. She has relapsing remiting MS. With MS there is not a single test to diagnose it....it is a process of elimination. She hasn't had another flare up and had to get off the Copaxone because of side effects. She is now on a experimental drug study for the last 9 months. (A pill) This website is very good and might have your answers on Lunesta.
http://brain.hastypastry.net/forums/...play.php?f=195
Good Luck!!