"i took ambien cr for a year and at first it worked pretty good except for a minor side effect that left a bad taste in my mouth. i didn&#039;t let that bother me as long as i was getting my 8 hours sleep. after a year it stopped working so i tried to double my dose. big mistake, i had to stop using it because i started sleep walking and having conversation with others without remembering anything. ambien works but be cautious of side effects."