What does the abbreviation 'qhs' mean in the context of medication instructions?

The abbreviation 'qhs' stands for "quaque hora somni," which is Latin for "every bedtime" or "every night at bedtime." In the context of medication instructions, this means that the medication is to be taken at night before sleeping. This usage is particularly relevant for medications that may help with sleep or need to be administered in a way that aligns with a patient’s sleep schedule.

Understanding this abbreviation is crucial for ensuring that patients adhere to their medication schedules correctly and experience the intended effects. In contrast, the other options refer to different timing related to meal consumption or requirements, which makes them incorrect in this context.