Rx can refer to:

• the symbol that originated in medical prescriptions. "℞" (also written as "Rx") and "medical prescription" are sometimes used interchangeably. The use of ℞ in prescriptions originated as an astrological symbol that was written for talismanic reasons at the start of medical prescriptions. Later it changed into (an uppercase R with its tail crossed), and was used as an abbreviation for the Latin word recipe = "take" (imperative), i.e. an instruction to the pharmacist to take the items listed in order to prepare the medicine. When printing came, it was rendered as "Rx"
• Rx or legend drug is a legal description in the United States for drugs that are only available on prescription from a licensed medical practitioner but are not controlled substances
• RX, an abbreviation for "receive" in radio jargon
• Rx, an abbreviation for "tens of Rupees"
• rx is an abbreviation for a chemical reaction
• rx, the RPC mechanism used by the Andrew file system

RX | RX | Rx