Commonly used for smoking cessation, Zyban® must be prescribed by your doctor. Typically, the recommended dosage is one 150 mg pill once a day for the first 3 days. After that, the dosage is increased to one 150 mg pill twice a day, 8 hours apart. It's a good idea to space your pills out so that the second pill of the day is several hours before bedtime as bupropion can have a side effect of insomnia.
Never take an "extra" dose to catch up for missing a pill. Wait and take the next pill at the normally scheduled time. Most doctors suggest using bupropion for 7 to 12 weeks to achieve the best results for smoking cessation. Never stop taking this drug abruptly, or without consulting your doctor first.
Zyban as a Quit Smoking Aid