Clinical Study of Generic and Brand Bupropion in Depression

The protocol is a prospective, randomized, double-blinded, crossover study with Major Depressive Disorder (MDD) receiving bupropion HCl 300mg XL (branded or generic). Subjects will be studied in 4 phases for a total of approximately 28 weeks: Phase 1: an approximately 4-week lead-in phase during which participants remain on their existing bupropion product Phases 2 - 4: randomized cross-over phases of approximately 6 weeks on each of the four bupropion study drugs (brand and 3 generics).