Wiktionary
qh
init. (context medicine English) ''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."
Wikipedia
QH
QH, qh, or q.h. may refer to: