I have been taking the generic form of ambien for 30 days - not every night, but have taken it 20 out of 30 nights. My issues started with a dull headache for about a week and then suddenly I feel like I have a horrible flu (only I don't - no temperature) severe muscle / joint aches mostly in my back and legs and still the headache. I quit taking it 3 days ago and my symptons are not getting better. Has anyone else had this experience? Thanks!