What does "PO" stand for in medical prescriptions?

The abbreviation "PO" in medical prescriptions stands for "by mouth," derived from the Latin phrase "per os." This term indicates that a medication should be taken orally, meaning that the patient is to swallow the drug. This route of administration is one of the most common ways medications are given, as it is generally the most convenient and non-invasive method for patients.

Other routes of administration mentioned, such as rectal (per rectum), sublingual (under the tongue), and topical (applied on the skin), refer to different methods of delivering medications, each suited for particular types of drugs or patient needs. Knowing the correct terminology helps healthcare providers ensure that medications are administered effectively and safely. Understanding that "PO" specifically pertains to oral ingestion underscores its importance in both prescribing and taking medications correctly.