A nurse is reviewing transcribed medication prescriptions. Which prescription is written correctly?

The first choice is considered the correctly written prescription because it adheres to standard medical abbreviations and formatting conventions that promote clarity and precision in medication orders. The prescription includes the medication name (Diazepam), the dose (10 mg), the route (PO, meaning orally), and the frequency (q8h, indicating every 8 hours) in a concise manner.

Using abbreviations such as "PO" and "q8h" is common in medical practice, allowing for efficient communication among healthcare providers. This format minimizes the risk of misunderstanding, which is crucial in ensuring patient safety.

In contrast, the other choices include variations that either lack the appropriate use of abbreviations or deviate from the preferred format for prescriptions. For example, the inclusion of "by mouth" or "every" may lead to longer prescriptions that are less concise and potentially more prone to errors in interpretation. Thus, the first choice exemplifies the optimal practice for prescribing medications clearly and efficiently.