q4h
Q4H is a medical abbreviation that stands for a dosing interval of every four hours. It is commonly used in prescriptions, patient charts, and nursing notes to indicate how frequently a drug or intravenous fluid should be administered. The notation can appear as Q4H, q4h, or Q4h and is understood in many healthcare settings, though its exact interpretation can vary by institution or country.
In practice, Q4H instructs a dose to be given at four-hour intervals, typically around the clock, which
Variants and considerations include different interval notations such as Q6H or Q8H, which reflect six- or
See also: dosage intervals, QID, Q6H, t.i.d.; pharmacokinetics and dosing schedules; hospital and pharmacy practice standards.