Sig code: prescription term

RX medical abbreviation

RX means "prescription", from the Latin "recipe".

Each meaning matched at least two public references (5 in all for RX), checked October 23, 2026. The table lists them.

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Meaning	Latin origin	Where used	Checked against
prescription	recipe	Prescriptions, Medication labels	MedlinePlus Appendix B: Some Common Abbreviations (NLM) NCI Thesaurus, including CDISC SDTM terminology (NCI EVS) NLM SPECIALIST Lexicon abbreviations file (LRABR) FDA Acronyms and Abbreviations Army Regulation 40-66, Appendix B: Authorized Medical Records Abbreviations

Also written: Rx.

Sample form text: "Rx pad."

A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.

What does RX mean in medical terms?

RX means "prescription", from the Latin "recipe".

What does RX stand for in Latin?

RX comes from "recipe", meaning "prescription".

Where is RX used?

RX shows up in prescriptions and medication labels. Its category here is sig code: prescription term.

Is RX on the Joint Commission Do Not Use list?

No. RX is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.