PC Medical Abbreviation
What does PC mean in medical terms?
What is PC?
PC (Post Cibum) is a Latin medical abbreviation meaning "after meals," used primarily in prescription and medication instructions to indicate that a drug should be taken after eating. It is one of several Latin dosing abbreviations that appear on prescriptions, medication labels, and clinical charts to guide the timing of drug administration. When you see PC on a prescription or pharmacy label, it means your healthcare provider wants you to take that medication after you have eaten a meal.
What PC Stands For and Its Latin Origin
PC is an abbreviation for the Latin phrase post cibum, which translates directly to "after food" or "after meals" in English. Latin has been the foundation of medical and pharmaceutical terminology for centuries, and many prescription abbreviations in use today trace back to this tradition. The word post means "after" in Latin, and cibum is the accusative form of cibus, meaning "food." Together, they form a precise instruction about the timing of a medication dose in relation to eating. Although modern medicine has shifted toward plain-language labeling in many contexts, PC remains widely used in clinical settings, hospital charts, and handwritten or electronic prescriptions.
How PC Is Used in Clinical and Prescription Settings
You are most likely to encounter PC on a written or printed prescription, on a pharmacy medication label, or in a patient's medication administration record (MAR) within a hospital or clinic. On a prescription, it typically appears alongside other Latin abbreviations. For example, a prescription might read "1 tab PO PC TID," which means "take one tablet by mouth after meals three times a day." In hospital settings, nurses and pharmacists refer to the MAR to time medication distribution around meal schedules. Electronic health record systems also use PC as a standardized dosing code, ensuring consistent communication between prescribers, pharmacists, and nursing staff. Some lab order sheets and clinical notes may also include PC when documenting medication administration times in relation to glucose testing or other meal-dependent evaluations.
What PC Means in Practice for Patients
When your prescription says PC, you should take that medication only after you have finished eating a meal, not before and not on an empty stomach. This timing instruction is not arbitrary. Some medications irritate the stomach lining or cause nausea when taken without food, so eating first creates a protective buffer. Others are absorbed better or work more effectively when food is present in the digestive system. If you skip a meal, you should ask your pharmacist or doctor whether you should still take the medication, take it with a small snack instead, or wait until your next meal. Following PC instructions as directed also helps keep blood levels of the medication more consistent throughout the day, which is important for drugs that require steady concentrations to be effective. Never assume that PC is a suggestion. It is a clinical instruction tied to how the drug behaves in your body.
PC Compared to Related Dosing Abbreviations
PC is one of several Latin abbreviations used to specify meal-related medication timing, and understanding how it differs from related terms helps you take medications correctly. The opposite of PC is AC, which stands for ante cibum and means "before meals." Some medications must be taken before eating to work properly, such as certain diabetes drugs or acid-reducing agents. Another related abbreviation is HS, from hora somni, meaning "at bedtime," which is sometimes confused with meal timing but refers to sleep rather than food. The abbreviation QD means "once daily" and says nothing about meals, while PC always specifies the relationship to eating. You may also see PC combined with frequency codes: PC BID means after two meals per day, and PC TID means after all three main meals. If you are uncertain how to interpret your specific prescription, your pharmacist is the most reliable resource for clarification before you start taking a new medication.
Questions About PC
What does PC mean in medical terms?▾
PC stands for <em>post cibum</em>, a Latin phrase meaning 'after meals.' In medical terms, it is a dosing instruction indicating that a medication should be taken after eating. It appears on prescriptions, pharmacy labels, and hospital medication records.
What does PC stand for on a prescription?▾
On a prescription, PC stands for <em>post cibum</em>, Latin for 'after meals.' It tells you to take your medication after eating rather than on an empty stomach. This timing is usually chosen to reduce stomach irritation or improve how the drug is absorbed.
How many times a day do I take a medication marked PC?▾
The PC abbreviation itself only tells you to take the medication after meals. The number of daily doses is specified by a separate frequency abbreviation. For example, PC BID means after two meals per day, and PC TID means after all three main meals.
What is the difference between PC and AC in medical abbreviations?▾
PC means 'after meals' (post cibum) and AC means 'before meals' (ante cibum). These two abbreviations are opposites and are not interchangeable. Taking an AC medication after meals or a PC medication before meals can reduce its effectiveness or increase side effects.
What should I do if I skip a meal but my prescription says PC?▾
If you miss a meal and your prescription is marked PC, do not take the medication on an empty stomach without guidance. Ask your pharmacist or prescribing doctor whether you should take the dose with a light snack, skip it, or wait until your next meal. The answer depends on the specific medication.
Why do doctors write PC instead of just saying 'after meals'?▾
Latin abbreviations like PC have been used in medicine and pharmacy for hundreds of years as a standardized shorthand. They allow prescribers and pharmacists to communicate dosing instructions concisely across different languages and health systems. Many electronic health record systems still use these codes as universal clinical shorthand.
Is PC a common abbreviation on prescription labels?▾
Yes, PC is one of the more common dosing abbreviations you will see on prescriptions and pharmacy labels, especially for medications that cause nausea or stomach upset when taken without food. It is regularly used alongside frequency codes like BID (twice daily) or TID (three times daily).
Can PC appear in contexts other than prescriptions?▾
Yes. In hospital settings, PC appears in medication administration records to schedule drug delivery around meal times. It can also appear in clinical notes and lab orders when meal timing is relevant to a test result, such as postprandial blood glucose readings taken after eating.