What is a key piece of information that must be on a prescription label?

A prescription label must include the medication name because it is crucial for ensuring that the patient receives the correct medication. This information helps both the dispensing pharmacist and the patient verify that the prescribed drug matches what is being dispensed, which is essential for safety and effective treatment.

Other details, such as the doctor's phone number, the patient's address, and the pharmacy's closing time, may be valuable in certain contexts, but they are not as critical on the prescription label itself. The medication name is central to identifying what the patient is taking, understanding its purpose, and avoiding potential medication errors or confusion about treatment.