What does the abbreviation Q4hr indicate?

The abbreviation Q4hr stands for "every 4 hours." This term is commonly used in veterinary medicine to dictate dosing schedules for medications. When a veterinarian prescribes medication to be administered Q4hr, it means that the medication should be given at four-hour intervals throughout the day. This is important for maintaining therapeutic drug levels in the patient and ensuring the effectiveness of the treatment. Understanding such abbreviations is crucial for veterinary medication clerks to ensure proper medication administration and adherence to the prescribed treatment plan.

The other options represent different dosing frequencies, but Q4hr specifically designates a four-hour interval, making it essential in the context of medication management.