The abbreviation 'ac' in a prescription means to take medication when?

The abbreviation 'ac' stands for "ante cibum," which is Latin for "before meals." When a prescription indicates that medication should be taken 'ac,' it instructs the patient to take the medication prior to eating. This timing can be important for certain medications, as taking them before meals can enhance absorption, minimize gastrointestinal side effects, or improve overall effectiveness. Understanding the meaning of such abbreviations is crucial for proper medication administration and ensuring patient safety.

In contrast, using 'pc' would indicate taking medication after meals, while 'prn' refers to taking medication as needed, and 'q12h' signifies a dosing schedule every 12 hours.