| Drug | Dose (mg) | Two-Dermatome Regression (min) | Complete Resolution (min) | Prolongation by Adrenergic Agonists (%) |
|---|---|---|---|---|
| Chloroprocaine | 30–100 | 30–50 | 70–150 | Not recommended |
| Lidocaine | 25–100 | 40–100 | 140–240 | 20–50 |
| Bupivacaine | 5–20 | 90–140 | 240–380 | 20–50 |
| Tetracaine | 5–20 | 90–140 | 240–380 | 50–100 |