Which part of a prescription is identified by the Rx symbol?

The Rx symbol is associated with the superscription of a prescription. The superscription represents the part of the prescription that is written at the top and includes the "Rx" symbol, which is derived from the Latin word "recipere," meaning "to take." This indicates to the pharmacist that a prescription is being issued and serves as a directive to prepare and dispense the medication as prescribed.

While the inscription refers to the actual medication details and dosage, the subscription provides instructions to the pharmacist on how to compound or prepare the medication. Signa, on the other hand, contains the directions for the patient on how to take the medication. Therefore, the superscription is distinct in that it formally indicates that a prescription is being written, signifying the start of a medication order.