How often should medication be taken if it is prescribed as 'q4h'?

When a medication is prescribed as 'q4h', it means that the medication should be taken every 4 hours. The term 'q' stands for "quaque," which is a Latin term meaning "every." The '4h' denotes the frequency interval of 4 hours. Therefore, after the initial dose, the next dose should be taken precisely 4 hours later, and this pattern continues for each subsequent dose. Understanding this terminology is crucial for administering medications accurately and ensuring effective treatment outcomes.