When scheduling medications for a patient, which abbreviation means before meals?

The abbreviation that means "before meals" is indeed AC, which stands for "ante cibum" in Latin. This term is commonly used in medical contexts to indicate that a medication should be taken before eating, helping to ensure optimal absorption or effectiveness.

When a medication is prescribed to be taken AC, it typically refers to a specific time frame, usually about 30 minutes before the meal. This timing allows the medication to work effectively in the patient’s system as food begins to digest.

The other abbreviations carry different meanings. HS, for example, stands for "hora somni," which means "at bedtime." PC indicates "post cibum," meaning "after meals," and QH stands for "quaque hora," which means "every hour." Understanding these abbreviations is crucial for administering medications safely and effectively.