(R)-Ropivacaine (Dextroropivacaine) is a voltage-dependent potassium channel blocker with local anesthetic activity. (S)-Ropivacaine is a medication used for the production of local or regional anesthesia for surgery and for acute pain management. Ropivacaine shows a difference in channel blockade between two enantiomers, and R-Ropivacaine shows greater cardiotoxicity than (S)-Ropivacaine. (R)-Ropivacaine is the impurity in commercial formulations of Ropivacaine.