Drug manufacturers are companies that develop, produce, and market medications. They play a crucial role in the healthcare system by creating both prescription and over-the-counter drugs. These manufacturers conduct extensive research and testing to ensure their products are safe and effective for patients. Once a drug is developed, manufacturers must obtain approval from regulatory agencies, such as the U.S. Food and Drug Administration (FDA), before it can be sold. After approval, they continue to monitor the drug's performance and side effects, ensuring that it meets safety standards throughout its lifecycle.