Final answer:
Prescriptions are required for medicines due to regulation, safety, and controlled substances.
Step-by-step explanation:
Prescriptions are required for some medicines for two main reasons:
- Regulation and safety: The government, specifically the Food and Drug Administration (FDA), regulates the medicines sold in the United States to ensure their safety and efficacy. Prescription medicines, which tend to be more potent or have higher risks, require a doctor's approval to prevent misuse or potential harm to patients.
- Controlled substances: Some medicines, such as certain painkillers and stimulants, have the potential for abuse and addiction. Requiring a prescription helps to regulate the distribution of these controlled substances and prevent their misuse.