Seen on a prescription, q.d. (or qd) means one a day (from the Latin quaque die). The abbreviation is sometimes written without a period in capital letters as "QD". 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.
q.h. (on prescription): :
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.
qid (on prescription):
Seen on a prescription, q.i.d. (or qid) means 4 times a day (from the Latin quater in die). The abbreviation q.i.d. is also sometimes written without a period in capital letters as "QID". 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.
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