Which statement describes ropivacaine compared to bupivacaine?

• A. Less cardiotoxicity, but much more expensive
• B. Higher potency
• C. Longer duration with lower toxicity
• D. Lower cost

Answer: (A)

Ropivacaine’s defining clinical difference from bupivacaine is a lower risk of cardiotoxicity, which comes from its lower lipid solubility and reduced affinity for cardiac sodium channels. This gives a larger safety margin for the heart while providing a similar block profile to bupivacaine. However, ropivacaine is less potent, so higher doses may be needed for comparable anesthesia, and it tends to be more expensive. Its duration of action is similar, not longer, which is why the combination “less cardiotoxicity but much more expensive” best describes the comparison.