I had been on Ambien
for less than a year. Mostly 7.5mg a night max
. When I went through vicodin withdrawal I upped the dosage to 10mg, which was my script max. I have had withdrawal symptoms galore. I got body jerks, metallic taste, no memory, disorientation, depression, anxiety, difficulty swallowing, breathing difficulty, panic attacks, vertigo, high to low BP... on and on. My dreams were vivid. The very slow taper and OTC drugs helped with the insomnia. Are you back on Lunesta?