"10 days on lunesta (generic).  not sure why doc suggested i try it, as i&#039;d been on same low dose of ambien for 3 years, good results.  anyway, had the metallic taste, just annoying but i slept so ok.  after a day or so waking up more, sleeping less. took an extra 1/2 last night -total 4.5 mg.  slept, but today all day major headaches and nausea. not sure what to do tonight-wishing for backup benedryl.  calling doc tomorrow-will request back to ambien."