Complex sentence: Marketed as Wellbutrin and Zyban among other trade names, it is one of the most frequently prescribed antidepressants in the United States, although in many English-speaking countries, including the United Kingdom, Australia and New Zealand, this is an off-label use.
Split into simpler sentences: Marketed as Wellbutrin and Zyban among other trade names, it is one of the most frequently prescribed antidepressants in the United States. Although in many English-speaking countries, including the United Kingdom, Australia and New Zealand, this is an off-label use.