Which of the following statements regarding local anesthesia is NOT true?

The statement regarding local anesthesia that is not true is that local anesthetics have a pH of 6.5. Local anesthetics typically have a pH that can vary based on their formulation and the conditions of the solution but is generally around 5 - 7 or can be lower in acidic solutions. The pH of 6.5 is not consistent with the normal characteristics of local anesthetic solutions, which can indeed be more acidic to enhance stability or solubility, especially in bag formulations.

Local anesthetics are potent vasodilators, meaning they can widen blood vessels, leading to increased blood flow. This characteristic can sometimes lead to a rapid systemic uptake if not administered carefully. Regarding their anticonvulsant properties, certain local anesthetics are known to exhibit this benefit, which can help in providing additional therapeutic effects, particularly in seizure management. Additionally, local anesthetics do not inherently cause hemostasis; rather, they can interfere with blood coagulation due to their vasodilatory effects.