If medication is indicated as PNV, what does this indicate to the patient?

When medication is indicated as PNV, it stands for "as needed for nausea and vomiting." This term informs the patient that they should take the medication only when experiencing nausea and vomiting, rather than on a fixed schedule. It is essential for patients to understand this designation so they do not take the medication unnecessarily, which can help prevent side effects and potential misuse.

Other options might suggest different meanings, but "as needed for nausea and vomiting" specifically addresses the situation of these symptoms, making it the most accurate interpretation of the abbreviation PNV.