What information cannot be altered on a prescription?

The information on a prescription that cannot be altered is the medication prescribed. This is crucial because the medication is specifically selected by the prescriber based on the patient's diagnosis and needs. Changing the medication could lead to significant health repercussions and undermine the prescriber's intent.

On the other hand, elements like the patient's address, drug strength, and directions for use can often be modified under specific circumstances, provided that the prescriber is informed and approves the change, depending on state laws and regulations. However, the actual medication indicated on the prescription must remain intact to ensure the safety and effectiveness of the patient's treatment plan.