I read some scary stuff regarding the side effects of Chantix, but in my experience the only side effect I suffered was my dreams became way more vivid. I didn't have any more nightmares than I had before using Chantix. The sex dreams though

I felt like a teenager again.
I actually think the tobacco companies might be behind some of the fear mongering that you find online. I postponed taking Chantix for years because of what I read online. All I can say is give it a try and see what happens. Medication affects people differently.