When a medication order specifies 'AS', which ear is being referenced?

When a medication order specifies 'AS', it refers to the left ear. The abbreviation 'AS' stands for "auris sinistra" in Latin, which translates to "left ear." This terminology is used in medical settings to avoid confusion in prescribing or administering medications, particularly when treatments are intended for specific ears. Understanding this nomenclature is vital for accurate medication administration and patient safety.

The choice indicating the right ear is incorrect, as it uses a different abbreviation: 'AD', which stands for "auris dextra." The option for both ears is represented by 'AU', and 'left eye' is denoted as 'OS'. Recognizing these distinctions helps ensure that medications are directed appropriately based on the specified abbreviations.