False about ropivacaine: (A) Less cardiotoxic than bupivacaine, (B) More cardiotoxic than lignocaine, (C) Contains only R enantiomer, (D) Onset of action is faster than bupivacaine
Answer is D. Ropivacaine contains only S enantiomer so cardiotoxicity is less than bupivacaine (but still higher than lignocaine). Anaesthetic propeies (onset, intensity; duration of I action) of ropivacaine are almost similar to bupivacaine.