I'm A 10-13 cig a day smoker. Started Chantix Nov 3 and on the 11th day. I cannot take the evening dose of 1mg b/c my sleep is restless. No serious problems, just a little nausea and sleeplessnes and no wierd dream as yet, hope not. Since it 's the weekend, I will try taking .5MG in the evening to see how I do. I'm still smoking about 2-3 a day and really hoping to wean off of it, if the .5mg works for me in the evening.