What does the abbreviation "PO" stand for in medical terms?

The abbreviation "PO" stands for "by mouth" in medical terminology. This term is derived from the Latin phrase "per os," which literally translates to "through the mouth." In the context of medication administration, it indicates that a drug or treatment is to be taken orally. This route is one of the most common methods of drug delivery, as it allows for ease of administration and absorption through the gastrointestinal tract.

Other routes of administration such as intravenous (administered directly into the bloodstream), inhaled (medications delivered through the respiratory tract), and subcutaneous (injections given under the skin) each have specific indications and methods, but they do not correspond to the "PO" designation. Understanding the distinctions between these routes is crucial for ensuring proper medication administration and patient safety.