The term "QH" indicates that a medication should be taken:

The term "QH" stands for "quaque hora," which is a Latin phrase meaning "every hour." In medical terminology, it is used to indicate that a medication should be administered hourly. Understanding this abbreviation is essential in ensuring that patients receive their medications at the correct intervals, which can be crucial for the effectiveness of certain treatments.

The other options refer to different frequencies but do not align with the meaning of "QH." For instance, "every day" would typically be indicated by "QD" or "daily," "twice a day" can be represented by "BID," and "once a week" would be indicated by "QW." Thus, knowing that "QH" specifically refers to administration every hour clarifies the administration schedule for the medication in question.