Medications are substances used to diagnose, treat, or prevent diseases and medical conditions. They can be classified into various categories, including prescription medications that require a doctor's approval and over-the-counter medications that can be purchased without a prescription. Each medication has specific uses, dosages, and potential side effects that must be understood for safe and effective use. The development and regulation of medications are crucial for public health. Organizations like the FDA ensure that medications are safe and effective before they reach consumers. Understanding how to use medications properly can significantly improve health outcomes and enhance the quality of life.