Yes, I'm going thru a rough time right now, with my mother terminally ill with cancer.
Determined to quit smoking, I've kept taking Chantix but last night was completely unable to sleep, and also having major anxiety. I am now 36 hours without sleep and called my physician for some anxiety medication.
Please don't take this as the norm for experience with this drug, as I'm going thru a rough time right now. I have battled anxiety before in my past, as well as sleep disturbance, without the added stress of my mother dying, so I can't say if it's a combination of the Chantix and the stress, or just Chantix totally. Until yesterday, I had just been taking Chantix once daily, but they up the dosage during the first week, and I had postponed taking the evening dosage till yesterday. Didn't sleep a wink.
Things got worse after that, but it is due to the stress I"m under.
Patty