What does the abbreviation "ac" indicate in a prescription?

The abbreviation "ac" in a prescription signifies "before meals." This term is derived from the Latin phrase "ante cibum," which translates directly to "before food." It is commonly used in medical prescriptions to specify when a medication should be taken, indicating that the patient should take the medication prior to eating. This instruction can be important for medications that need to be absorbed properly, as taking them on an empty stomach can enhance their effectiveness or reduce potential side effects associated with food interactions. Understanding such abbreviations is essential for ensuring medications are taken as intended for optimal therapeutic benefit.