Definition from Wiktionary, the free dictionary
See also: q.h.
qh or q.h.
- (medicine) quaque hora: every hour - used in medical pharmacy prescriptions usually with a numeral defining hours between doses. "q4h" read as: "taken every 4 hours". Also common is the format: "3 caps q4h" read as" means "Take 3 capsules every 4 hours."