Clinical Pharmacokinetics of Local Anaesthetics
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Questions and Answers

What is the primary mechanism of action of local anesthetic agents?

  • Blocking the voltage-gated sodium channels (correct)
  • Blocking the release of neurotransmitters from nerve terminals
  • Depolarizing the neuronal membrane
  • Inhibiting the reuptake of dopamine

Which of the following types of local anesthetics is characterized by an amide linkage in its chemical structure?

  • Ester-type local anesthetics
  • Amide-type local anesthetics (correct)
  • Amine-type local anesthetics
  • Ketone-type local anesthetics

What is the primary route of elimination of local anesthetic agents?

  • Hepatic metabolism (correct)
  • Fecal excretion
  • Biliary excretion
  • Renal excretion

What is the primary clinical application of local anesthetic agents?

<p>Anesthesia for surgical procedures (C)</p> Signup and view all the answers

What is the primary pharmacodynamic effect of local anesthetic agents?

<p>Analgesia (A)</p> Signup and view all the answers

Which of the following local anesthetic agents is most likely to cause methemoglobinemia?

<p>Benzocaine (A)</p> Signup and view all the answers

What is the primary mechanism by which local anesthetics produce vasodilation?

<p>Blockade of alpha-1 adrenergic receptors (B)</p> Signup and view all the answers

Which of the following types of nerve fibers is most resistant to the effects of local anesthetic agents?

<p>C-fibers (D)</p> Signup and view all the answers

What is the primary factor determining the duration of action of local anesthetic agents?

<p>Protein binding (D)</p> Signup and view all the answers

Which of the following local anesthetic agents is most likely to cause central nervous system toxicity at clinically relevant doses?

<p>Bupivacaine (B)</p> Signup and view all the answers

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