q.h.

q.h.: Abbreviation for "every hour." On a prescription or doctor's hospital orders, q.h. means every hour. Also written qh (without the periods). From the Latin quaque meaning once + h for hour. However it is written, it is one of a number of hallowed abbreviations of Latin terms that have been traditionally used in prescriptions to specify the frequency with which medicines should be taken. Other examples include: q.d. (qd or QD) is once a day; q.d. stands for ôquaque dieö (which means, in Latin, once a day). b.i.d. (bid or BID) is twice a day; b.i.d. stands for ôbis in dieö (which means twice a day). t.i.d. (or tid or TID) is three times a day ; t.i.d. stands for ôter in dieö (in Latin, 3 times a day). q.i.d. (or qid or QID) is four times a day; q.i.d. stands for ôquater in dieö (in Latin, 4 times a day). q_h: If a medicine is to be taken every so-many hours, it is written ôq_hö; the ôqö standing for ôquaqueö and the ôhö indicating the number of hours. So, for example, ô2 caps q4hö means ôTake 2 capsules every 4 hours.ö