Which abbreviation is commonly used in medical prescriptions to denote "every hour"?

The abbreviation commonly used in medical prescriptions to denote "every hour" is Q.H. This abbreviation stands for "quaque hora," which is Latin for "every hour." It is important in medical settings to convey the frequency of medication administration clearly. When a physician prescribes medication to be taken Q.H., it indicates that the patient should take the medication once every hour.

In contrast, the other abbreviations serve different meanings. T.I.D. refers to "three times a day," indicating the medication should be taken at roughly equal intervals throughout the day. P.R.N. means "as needed," which suggests that the medication should be taken only when necessary, not on a scheduled basis. B.I.D. indicates medication should be taken "twice a day." Understanding these abbreviations is crucial for accurately following medication orders and dosage regimens in a clinical environment.