The abbreviation "qhs" is used to indicate medication is taken:

The abbreviation "qhs" stands for "quaque hora somni," which is Latin for "every night at bedtime." This term is commonly used in medical settings to specify that a particular medication should be administered at night, specifically before the patient goes to sleep. This is particularly relevant for medications that may help with sleep, manage nighttime symptoms, or maintain a certain therapeutic level in the body overnight.

Understanding medical abbreviations is crucial for ensuring proper medication administration and adhering to prescribed schedules. The other options describe different frequency of administration, but do not align with the meaning of "qhs." For example, "every day" denotes a daily administration which is not what "qhs" specifies. Similarly, "every morning" refers to medications taken in the morning hours, and "every other week" indicates a much less frequent interval, all of which are inconsistent with the definition of "qhs."