Why rx is writen on medical priscription?
Answers:
Rx is the symbol that originate in medical prescriptions. "" (also written as "Rx") and "medical prescription" are sometimes used interchangeably. The use of within prescriptions originated as an astrological symbol that be written for talismanic reasons at the start of medical prescriptions. Later it changed into (an uppercase R next to its tail crossed), and was used as an contraction for the Latin word recipe = "take" (imperative), i.e. an instruction to the pharmacist to take the items tabled in establish to prepare the medicine. When printing come, it was rendered as "Rx"
ask Cecil!
http://www.straightdope.com/mailbag/mrx..
I conjecture it used to be Px but as people wrote it faster, the P melt into the x and we now hold Rx.
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