OK, stupid topic but I have always wondered about this. This generally comes up with a narcotic, and we use it all the time for Tylenol with codeine po q4 to q6 hours.
It would be nice if 5 fit into a 24 day. But, isn't q4 to q6 confusing? Do we want the patient to use the medication q4 hours prn pain or q6 hours prn pain?
