LOCAL ANESTHETICS Multiple Choice Questions and Answers pdf :-

1. Local anesthetics produce:
a) Analgesia, amnesia, loss of consciousness
b) Blocking pain sensation without loss of consciousness
c) Alleviation of anxiety and pain with an altered level of consciousness
d) A stupor or somnolent state

2. A good local anesthetic agent shouldn’t cause:
a) Local irritation and tissue damage
b) Systemic toxicity
c) Fast onset and long duration of action
d) Vasodilatation

3. Most local anesthetic agents consist of:
a) Lipophylic group (frequently an aromatic ring)
b) Intermediate chain (commonly including an ester or amide)
c) Amino group
d) All of the above

4. Which one of the following groups is responsible for the duration of the local anesthetic action?
a) Intermediate chain
b) Lipophylic group
c) Ionizable group
d) All of the above

5. Indicate the local anesthetic agent, which has a shorter duration of action:
a) Lidocaine
b) Procaine
c) Bupivacaine
d) Ropivacaine

6. Which one of the following groups is responsible for the potency and the toxicity of local anesthetics?
a) Ionizable group
b) Intermediate chain
c) Lipophylic group
d) All of the above

7. Indicate the drug, which has greater potency of the local anesthetic action:
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Mepivacaine

8. Ionizable group is responsible for:
a) The potency and the toxicity
b) The duration of action
c) The ability to diffuse to the site of action
d) All of the above

9. Which one of the following local anesthetics is an ester of benzoic acid?
a) Lidocaine
b) Procaine
c) Ropivacaine
d) Cocaine

10. Indicate the local anesthetic, which is an ester of paraaminobenzoic acid:
a) Mepivacaine
b) Cocaine
c) Procaine
d) Lidocaine

11. Which of the following local anesthetics is an acetanilide derivative?
a) Tetracaine
b) Lidocaine
c) Cocaine
d) Procaine

12. Indicate the local anesthetic, which is a toluidine derivative:
a) Lidocaine
b) Bupivacaine
c) Prilocaine
d) Procaine

13. Which of the following local anesthetics is a thiophene derivative?
a) Procaine
b) Ultracaine
c) Lidocaine
d) Mepivacaine

14. Local anesthetics are:
a) Weak bases
b) Weak acids
c) Salts
d) None of the above

15. For therapeutic application local anesthetics are usually made available as salts for the reasons of:
a) Less toxicity and higher potency
b) Higher stability and greater lipid solubility
c) Less local tissue damage and more potency
d) More stability and greater water solubility

16. Which of the following statements is not correct for local anesthetics?
a) In a tissue they exist either as an uncharged base or as a cation
b) A charged cationic form penetrates biologic membranes more readily than an uncharged form
c) Local anesthetics are much less effective in inflamed tissues
d) Low ph in inflamed tissues decreases the dissociation of nonionized molecules

17. Which one of the following statements about the metabolism of local anesthetics is incorrect?
a) Metabolism of local anesthetics occurs at the site of administration
b) Metabolism occurs in the plasma or liver but not at the site of administration
c) Ester group of anesthetics like procaine, are metabolized systemically by pseudocholinesterase
d) Amides such as lidocaine, are metabolized in the liver by microsomal mixed function oxidases

18. Indicate the anesthetic agent of choice in patient with a liver disease:
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Etidocaine

19. Which of the following local anesthetics is preferable in patient with pseudocholinesterase deficiency?
a) Procaine
b) Ropivacaine
c) Tetracaine
d) Benzocaine

20. The primary mechanism of action of local anesthetics is:
a) Activation of ligand-gated potassium channels
b) Blockade of voltage-gated sodium channels
c) Stimulation of voltage-gated N-type calcium channels
d) Blockade the GABA-gated chloride channels

21. Which of the following local anesthetics is more water-soluble?
a) Tetracaine
b) Etidocaine
c) Procaine
d) Bupivacaine

22. Indicate the local anesthetic, which is more lipid-soluble:
a) Bupivacaine
b) Lidocaine
c) Mepivacaine
d) Procaine

23. The more lipophylic drugs:
a) Are more potent
b) Have longer duration of action
c) Bind more extensively to proteins
d) All of the above

24. Which of the following fibers is the first to be blocked?
a) Type A alpha fibers
b) B and C fibers
c) Type A beta fibers
d) Type A gamma fibers

25. Indicate the function, which the last to be blocked:
a) Pain, temperature
b) Muscle spindles
c) Motor function
d) Touch, pressure

LOCAL ANESTHETICS Interview Questions and Answers ::

26. Which of the following fibers participates in high-frequency pain transmission?
a) Type A delta and C fibers
b) Type A alpha fibers
c) Type B fibers
d) Type A beta fibers

27. Which of the following local anesthetics is an useful antiarrhythmic agent?
a) Cocaine
b) Lidocaine
c) Bupivacaine
d) Ropivacaine

28. Indicate the route of local anesthetic administration, which is associated with instillation within epidural or subarachnoid spaces:
a) Topical anesthesia
b) Infiltrative anesthesia
c) Regional anesthesia
d) Spinal anesthesia

29. The choice of a local anesthetic for specific procedures is usually based on:
a) The duration of action
b) Water solubility
c) Capability of rapid penetration through the skin or mucosa with limited tendency to diffuse away from the site of application
d) All of the above

30. Which of the following local anesthetics is a short-acting drug?
a) Procaine
b) Tetracaine
c) Bupivacaine
d) Ropivacaine

31. Indicate the local anesthetic, which is a long-acting agent:
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Mepivacaine

32. The anesthetic effect of the agents of short and intermediate duration of action can not be prolonged by adding:
a) Epinephrine
b) Norepinephrine
c) Dopamine
d) Phenylephrine

33. A vasoconstrictor does not:
a) Retard the removal of drug from the injection site
b) Hence the chance of toxicity
c) Decrease the blood level
d) Reduce a local anesthetic uptake by the nerve

34. Vasoconstrictors are less effective in prolonging anesthetic properties of:
a) Procaine
b) Bupivacaine
c) Lidocaine
d) Mepivacaine

35. Which of the following local anesthetics is only used for surface or topical anesthesia?
a) Cocaine
b) Tetracaine
c) Procaine
d) Bupivacaine

36. Indicate the local anesthetic, which is mainly used for regional nerve block anesthesia:
a) Dibucaine
b) Bupivacaine
c) Tetracaine
d) Cocaine

37. Which of the following local anesthetics is used for infiltrative and regional anesthesia?
a) Procaine
b) Lidocaine
c) Mepivacaine
d) All of the above

38. Indicate the local anesthetic, which is used for spinal anesthesia:
a) Tetracaine
b) Cocaine
c) Dibucaine
d) Bupivacaine

39. Which of the following local anesthetics is called a universal anesthetic?
a) Procaine
b) Ropivacaine
c) Lidocaine
d) Bupivacaine

40. Most serious toxic reaction to local anesthetics is:
a) Seizures
b) Cardiovascular collapse
c) Respiratory failure
d) All of the above

41. Correct statements concerning cocaine include all of the following EXCEPT:
a) Cocaine is often used for nose and throat procedures
b) Limited use because of abuse potential
c) Myocardial depression and peripheral vasodilatation
d) Causes sympathetically mediated tachycardia and vasoconstriction

42. Which of the following local anesthetics is more cardiotoxic?
a) Procaine
b) Bupivacaine
c) Lidocaine
d) Mepivacaine

43. Most local anesthetics can cause:
a) Depression of abnormal cardiac pacemaker activity, excitability, conduction
b) Depression of the strength of cardiac contraction
c) Cardiovascular collapse
d) All of the above

44. Which one of the following local anesthetics causes methemoglobinemia?
a) Prilocaine
b) Procaine
c) Lidocaine
d) Ropivacaine

45. Procaine has all of the following properties EXCEPT:
a) It has ester linkage
b) Its metabolic product can inhibit the action of sulfonamides
c) It readily penetrates the skin and mucosa
d) It is relatively short-acting

46. Correct statements concerning lidocaine include all of the following EXCEPT:
a) It is an universal anesthetic
b) It has esteratic linkage
c) It widely used as an antiarrhythmic agent
d) It is metabolized in liver

47. Which of the following local anesthetics is more likely to cause allergic reactions?
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Ropivacaine

48. Tetracaine has all of the following properties EXCEPT:
a) Slow onset
b) Low potency
c) Long duration
d) High toxicity

49. Correct statements concerning bupivacaine include all of the following EXCEPT:
a) It has low cardiotoxicity
b) It has amide linkage
c) It is a long-acting drug
d) An intravenous injection can lead to seizures

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