The FDA Office of Generic Drugs ensures safe, affordable generic medications reach patients by reviewing applications, enforcing bioequivalence standards, and managing global supply chains under GDUFA and Hatch-Waxman laws.
Paragraph IV certifications let generic drug makers legally challenge brand-name patents before market entry. This Hatch-Waxman Act tool saves billions annually by forcing patent disputes into court, rewarding first challengers with 180 days of exclusivity.
The first generic drug manufacturer to enter the market after a patent expires captures up to 80% of sales during its 180-day exclusivity-and often holds 30-40% years later due to pharmacy and prescriber loyalty.