What does the abbreviation 'ac' signify in a medical context?

The abbreviation 'ac' in a medical context stands for "ante cibum," which is Latin for "before meals." This term is commonly used in prescriptions or dietary guidelines to indicate that a medication or food should be taken or consumed before eating. Understanding this abbreviation is essential for patient care, as it helps ensure that medications are taken at the appropriate times for maximum effectiveness. For example, certain medications may be better absorbed when the stomach is empty, hence the instruction to take them 'ac'. This knowledge is crucial for nursing assistants who assist patients with their dietary needs and medication schedules.