What is the abbreviation for "per os," which indicates the oral administration of medication?

The abbreviation "PO," which stands for "per os," is used in medical settings to indicate that a medication should be administered orally. The term "per os" is derived from Latin, meaning "by mouth." This designation is crucial in medication administration because it specifies the route by which a drug should be taken, ensuring proper dosage and absorption.

Other options do not relate to oral medication. For instance, "PMD" may refer to other medical terms or specialties, while "PERRL" describes pupil examination findings (pupils are equal, round, and reactive to light), and "PED" often refers to pediatrics or a pediatric dosage of medication. Understanding these distinctions is essential for accurately interpreting medical abbreviations in clinical practice.