Table 1.
MW (g/mol) (base form) | Lipid solubility (log [octanol/buffer partition coefficient]) at pH 7.4 | pKa (−log Ka) at 36°C | Potency∗ | |
---|---|---|---|---|
Levobupivacaine | 288 | 2.539 | 8.1 | 8 |
Ropivacaine | 274 | 2.060 | 8.1 | 6 |
Lidocaine | 234 | 1.633 | 7.8 | 2 |
Mepivacaine | 246 | 1.322 | 7.7 | 1.5 |