(text) They are both safe and effective according to the United States Food and Drug Administration (FDA). Bupropion is a type of anti-anxiety medication that relieves withdrawal symptoms and improves the success rate of smoking cessation. Side effects include nausea, vomiting, dry mouth, and seizures, but the likelihood of them occurring is low. Varenicline is the most recently developed drug (approved by the FDA in May 2006) that binds nicotine receptors in the brain instead of nicotine to produce nicotine-like effects. As a result, withdrawal symptoms are reduced and smoking cessation is suppressed. Side effects include nausea, headache, insomnia, but there are no serious side effects. Depending on the individual's constitution and state of health, individual responses to medications may be different. So, it is necessary to have a regular consultation with a