Yes Chantix can cause insomnia in some people.
Some of the side effects of taking Chantix are Insomnia, nausea, abnormal dreams, constipation, sleep disorder, vomiting, flatulence and dyspepsia.
Chantix and Wellbutrin can be taken together safely.
When you take Chantix and Wellbutrin together you have a much better chance at quitting smoking much quicker than you would if you just took Chantix alone or Wellbutrin alone.
When Chantix and Wellbutrin are taken together it helps you quit smoking much faster.
Even when taking Chantix and Wellbutrin together there can still be a relapse a year later but if you really want to quit smoking faster it's recommended to take Chantix and Wellbutrin together.
If you only take one or the other it can take longer to quit smoking.
So I would recommend taking both Chantix and Wellbutrin together if you want to quit smoking faster.
My brother used to smoke and he was having trouble quitting smoking with just Chantix but he started taking both of them together and he quit smoking much faster.