The longest acting local anesthetics -
long acting ester local anesthetic -Benzocaine . tetracaine long acting amide local anesthetic- bupivacaine, ropivacaine , levobupivacaine , dibucaine overall longest acting local anesthetic- Dibucaine- Tetracaine- Bupivacaine
Bupivacaine
Ropivacaine
Dibucaine
Tetracaine
Regional Anesthesia