| Drug | Two-Regression (min) | Dermatome Resolution (min) | Complete Prolongation by Epinephrine (%) |
|---|---|---|---|
| Chloroprocaine 3% | 45–60 | 100–160 | 40–60 |
| Lidocaine | 60–100 | 160–200 | 40–80 |
| Mepivacaine 2% | 60–100 | 160–200 | 40–80 |
| Ropivacaine 0.5%–1% | 90–180 | 240–420 | None |
| Etidocaine 1%–1.5% | 120–240 | 300–460 | None |
| Bupivacaine 0.5%–0.75% | 120–240 | 300–460 | None |