What is the abbreviation used for a medical prescription?

The abbreviation used for a medical prescription is "Rx." This shorthand originates from the Latin word "recipe," which means "to take." In the context of prescriptions, "Rx" symbolizes a directive to the pharmacist to prepare a specific medication for the patient. This abbreviation is universally recognized among healthcare professionals and is an essential part of medical documentation.

In contrast, the other options listed serve different purposes in the medical field. "ROS" stands for "Review of Systems," which is a method of gathering information about a patient's overall health status during a medical evaluation. "ROM" refers to "Range of Motion," a term commonly used in physical therapy and rehabilitation to describe the movement around a joint. Meanwhile, "SOB" stands for "Shortness of Breath," a common symptom that is assessed during patient evaluations but does not relate to prescriptions or pharmacy contexts. Therefore, "Rx" is the clear choice as it directly pertains to medical prescriptions.