I am new to this site so thanks for all of the warm welcomes fellow quitters! I believe I am on day 70 smoke-free thanks to Chantix. I am nearing the end of my 120 day Rx, and after reading some of your posts regarding higher success rates with another 120 days, I have decided to request another round. I am very excited about this as the med has been working wonders for me! I did ask if it's ok to cut the pills in half however, because I'm not getting much sleep on the full dose and they make me very nauseous.... that's not going away. This only means I will have that many more doses to go beyond 120 days too, further ensuring my quit continues. I wonder though, has anyone here found the med to be less effective on 1/2 dose? Also, I find that I get very irritable at times on this med unfortunately. Anyone else experience this? I wonder if this will decrease on 1/2 dose.