What does the abbreviation QH4 stand for in a medical context?

In a medical context, the abbreviation QH4 signifies "every four hours." This term is derived from the Latin word "quaque hora," meaning "every hour." When the number is specified as 4, it indicates the frequency of administration or a scheduled activity every four hours. Such abbreviations are essential for clear and concise communication among healthcare professionals, ensuring that treatments and medications are administered at appropriate intervals for patient care.

Other options refer to different frequencies or actions. "Four times daily" means a different schedule altogether, as it denotes four separate doses distributed across the day rather than specifying an interval of hours. "Every other day" refers to a schedule that alternates days, which does not correlate with the specified four-hour interval. "Range of motion" is a term used in physical therapy and rehabilitation, unrelated to medication timing. Thus, QH4 is specifically linked to the frequency of every four hours.