It is a unique way to quit smoking. Zyban costs less than other smoking cessation programs. As the first non-nicotine, oral medication, Zyban is FDA-approved as an aid to smoking cessation. There is not any conclusive data regarding the way Zyban curtails nicotine addiction. Certain researchers believe that Zyban acts on the part of the brain that is addicted to the ingredients in cigarettes. Dry mouth, headache, increased sweating, nausea/vomiting, constipation, anxiety, fatigue and blurred vision are potential side events. Although Zyban should be taken as directed, it is usually prescribed twice daily for 7 to 12 weeks.