If a medication is ordered "QHS," what does that mean?

When a medication is ordered "QHS," it indicates that the medication should be administered at every bedtime or specifically at the time when the patient is going to sleep. The term "QHS" is a commonly used abbreviation in medical settings derived from the Latin phrase "quaque hora somni," which translates to "every night at bedtime."

This abbreviation is crucial for ensuring that patients receive their medications at the appropriate times to maximize their effectiveness and adherence to treatment regimens. For instance, certain medications might be intended to aid sleep or manage conditions that are more effectively treated overnight. Understanding the timing associated with medication administration is essential in a clinical context, as it helps avoid potential complications related to missed doses or incorrect timing.