What it means
From the Latin quaque nocte, every night. Handwritten, qn has been read as "qh," every hour. ISMP lists it as error-prone and advises writing "nightly" or "at bedtime," or using qhs.
For the nurse
Clarify any order written with qn before giving the drug.
Related terms
qhs
Every night at bedtime, from the Latin quaque hora somni.