How frequently is a medication administered if it is designated as 'q12h'?

A medication designated as 'q12h' stands for "every 12 hours." This means the medication should be administered twice a day, with a 12-hour interval between each dose. For instance, if a dose is given at 8 AM, the next dose would be scheduled for 8 PM. Understanding medical abbreviations like 'q' (from the Latin "quaque") is essential for properly timing medication doses to ensure effectiveness and maintain therapeutic levels in the body. The other options do not match the specified 12-hour frequency, clarifying why 'q12h' is uniquely defined as administering the medication every 12 hours.