prescribe

When your doctor tells you to take something for an illness, like medicine, or tells you to follow a certain treatment, they prescribe it. It is more than a casual suggestion. It is a formal recommendation, usually from someone with medical authority. A doctor might prescribe antibiotics for an infection or physical therapy after an injury.

The word comes from the Latin praescribere, meaning "to write before," because prescriptions were originally written instructions. It can also mean to set down a rule or say what should be done, as when rules prescribe how something must happen. Most often, though, we hear it in a medical context: "The doctor prescribed antibiotics for her infection."

To prescribe something means to officially recommend a treatment, medication, or course of action, usually by a medical professional. It carries the weight of expert advice and is often a legal requirement for obtaining medication. For example: "The doctor prescribed pain relievers for her headache," or "My therapist prescribed daily meditation."

Historically, prescribe meant to write or set something down in advance as an order or instruction. That broader meaning still exists today. Rules, laws, and official guidelines can prescribe what people must do, what is allowed, or what steps must be followed. A school might prescribe certain books for a course, or safety rules might prescribe the way a machine should be used.

However, the most common usage today is within healthcare. A prescription isn't just a suggestion; it's an authorization for a pharmacist to dispense medication. The term is also used when recommending lifestyle changes as part of a formal treatment plan: "The doctor prescribed a low-sodium diet and regular exercise."

It's important to note that only licensed professionals (such as doctors, dentists, or nurse practitioners) can legally prescribe medications. Attempting to do so without proper authorization is illegal in many jurisdictions.

Ultimately, whether it's medication for an illness, rules for behavior, or a plan for improvement, to prescribe means to authoritatively recommend something as necessary or beneficial—often with the expectation of compliance.