Which abbreviation is used for Reaction?

• A. Rx
• B. s/s
• C. rxn
• D. sts

Answer: (C)

Reaction is commonly abbreviated as rxn in clinical notes, making it the clear shorthand used by clinicians to denote a reaction, such as an allergic rxn to penicillin. The symbol Rx is typically reserved for prescriptions, recipe orders, or treatment instructions, not a reaction. s/s stands for signs and symptoms, which describe what is observed or reported but not the specific term for the reaction itself. sts isn’t a standard abbreviation for reaction in medical documentation. So, rxn is the appropriate abbreviation to represent reaction.