| Agent | Drug class | Concentration (%) | Onset | Duration* | Maximum dose (mg per kg) |
|---|---|---|---|---|---|
| Lidocaine (Xylocaine) | Amide | 1 | Rapid | 30 to 60 minutes | 4 |
| Mepivacaine (Carbocaine) | Amide | 1 | Moderate | 45 minutes to 1.5 hours | 4 |
| Bupivacaine (Marcaine) | Amide | 0.25 | Slow | 2 to 4 hours | 3 |
| Procaine (Novocain) | Ester | 1.0 to 2.0 | Slow | 15 to 60 minutes | 7 |
| Tetracaine (Pontocaine) | Ester | 0.25 | Slow | 2 to 3 hours | 1.5 |
| Chloroprocaine (Nesacaine) | Ester | 2 | Slow | 30 minutes | 6 to 7 |