What does "ac" signify in medication instructions?

The abbreviation "ac" stands for "ante cibum," which is a Latin term meaning "before meals." This instruction is commonly used in medication prescriptions to indicate that a medication should be taken prior to eating. Taking medication before meals can help enhance absorption and efficacy, and is an important consideration for certain medications that require an empty stomach for optimal effect. Understanding these abbreviations is crucial for safe and effective medication administration.