What does 'Ad lib' or 'prn' mean in medical terminology?

The term 'Ad lib' is derived from the Latin phrase 'ad libitum,' which translates to "at one's pleasure" or "as much as one desires." In veterinary medicine, this indicates that a medication, treatment, or food can be given freely or as needed by the animal, allowing for flexibility in administration based on the animal's specific requirements at any given time.

The abbreviation 'prn' stands for 'pro re nata,' which translates to "as needed" in Latin. This term is commonly used in medical settings to denote that a medication or treatment should be provided only when necessary, rather than on a scheduled basis.

Both terms emphasize the importance of assessing the situation and making decisions based on the specific needs of the patient, ensuring that care is tailored to the individual animal rather than a one-size-fits-all approach.