Anne, I just saw this section and read through your post and replies. This started a while back, so I don't know when your surgery is, but I hope this reaches you beforehand. If not, my information will still hopefully be of help.
I just had an ACDF of C5-6 in February, and I too am a smoker. It wasn't until AFTER my surgery that I learned all the pitfalls of smoking on fusion, so at least you have the info up front! Yes, nicotine can and does inhibit fusion, which is every reason in the world to do all you can to quit, because believe me, you don't want this surgery twice! I didn't stop smoking until the night before my surgery, and I relapsed three days after. I am VERY blessed that at my three month post-op, fusion had indeed taken place. But that didn't mean I didn't pray like mad that I wasn't messing it up!
I too have never heard of Chantix being a problem interfering with pain meds. Quite the opposite. You can't take any smoking cessation products that contain nicotine, because again, nicotine is the problem. That's why Chantix IS a viable alternative to just going cold turkey. Part of the problem is also the loss of oxygen nicotine causes for proper fusion. These are the same reasons smoking contributed to the degeneration of our discs in the first place, and will continue to do if we don't stop smoking. I don't know about you, but although my surgery was thankfully successful, I don't want to go through it ever again.
There is a fabulous website that was invaluable to me after my surgery to answer questions no one else seemed to answer, or instead of calling my surgeon's office every day. It is Spine-Health.com. I HIGHLY recommend you check it out. Now it seems there are a lot of horror stories out there too, so don't be put off by them. That doesn't mean you'll be one of them. I wore a soft collar for about two full weeks, then was told I didn't need to wear it anymore and that I could drive again. I was lucky and fused beautifully even though I smoked. (That is NOT a recommendation to keep smoking!) They removed my disc, inserted donor bone, and I have a titanium plate and screws holding it all together. I'm doing great, considering. At 6 weeks I was given the clear to go back to work. (Sadly, I lost my job in Nov. so am still looking.) I do find I still tire easily, and am still sore as I had spinal realignment as well and my body's getting used to being in a new position. I also have fibromyalgia and get daily headaches and migraines, so that is an added challenge to my recovery, but I am NOT in an incapacitated, constantly drugged up state. I read of so many taking tons of pain meds and muscle relaxants, etc. Not me, even with my challenges. I had my surgery on a Tueday morning and was released Wednesday afternoon. I came home with one prescription of Norco, refilled it once and have not used that up. Right before your surgery and for three months afterwards, do NOT take any meds that are blood thinners -- in otherwords, no aspirin, no ibuprofin (Advil), no Aleve. That was frustrating to me, because Tylenol might as well be Sweet Tarts, but the pain meds will help, and soon enough you'll be able to use Advil again. I find that much more effective with the type of issues we have because it is an anti-inflammatory. Even doing everything right and having the acute immediate pain over, it will still probably be about a year before your body is truly "back to normal." That is not to say you won't feel better for a year -- you will. Full recover of such major surgery just takes time. Be patient with yourself and your body and take care of it.
Don't overdo or disobey your doctor's orders. Don't do the dishes, don't vaccuum, don't do laundry, don't lift more than that gallon of milk -- really!! You will heal MUCH faster if you REST. Your body truly needs it. And when you do start to do things, go slow, and listen to your body. Don't push it, and when it hurts, STOP! You didn't mention where your herniated dis