In English the abbreviation Rx is commonly written on medicine that can only be sold with a doctor's prescription. Such an abbreviation can be found in drug instructions and packaging, pharmaceutical and dispensing documents, medical textbooks, and patient brochures.

Unicode has a special symbol called "Prescription Take" that consists of a capital Latin "R" and a small letter "x" combined into a smart-looking symbol. It looks original and remarkable in text, so there’s no chance a person reading the paper will miss some important information about the prescription required. The symbol belongs to the [URL /blocks/letterlike-symbols/ letterlike symbols] block.