insomnia
"I have been taking ambien/zolpidem for several years now and have always had great sleep. But, since my pharmacy has taken to using the Mylan generic all that has changed.  It has caused night time binging, relentless picking at sores in sleep, hours awake in the middle of the night.  I'd been taking 10mg but with this generic I find I often need to take another 5mg to sleep.  My sleep has been disruptive almost every night.  I used to think ambien/zolpidem was the greatest help.   Now I've asked my doctor for a different sleep aid."