Buy Varenicline Quit Smoking: Some people may feel sleepy or dizzy, or have trouble concentrating. If you are using varenicline and experience hostility, agitation, depression, suicidal thoughts, or changes in how you act that you don’t think are due to quitting smoking, you should stop taking the medicine and talk to your doctor right away.
After 8 weeks, 26.3% (200/760) of the varenicline group reduced smoking by ≥ 75% from baseline or abstained compared with 15.1% (113/750) of placebo (RD = 11.3; 95% CI 7.2%, 15.3%; RR = 1.8; 95% CI 1.4, 2.2).