Local Anesthetics

Question 1

Benzocaine

Answer 1

Topical agent

Dermatological conditions, hemorrhoid, premature ejaculation, anesthetic lubricant (NG tube, endoscopic tube and catheters)

Question 2

Bupivacaine

Answer 2

Prolonged anesthesia

More sensory block than motor

Question 3

Cocaine

Answer 3

Blockade of nerve impulses and local vasoconstricting actions

Inhibit local NE reuptake

Topical anesthetic of upper respiratory tract

Question 4

Dibucaine

Answer 4

Topical cream on skin only

Had toxicity when given as injection

Question 5

Lidocaine

Answer 5

Prototypical amide local alternative choice for pts sensitive to esters

Faster, more intense, longer lasting and more extensive anesthesia than procaine

Antiarrhythmic agent

Question 6

Procaine

Answer 6

Lower potency, slower onset, shorter duration of action

Infiltration anesthesia only

Metabolite inhibits action of sulfonamide antibiotics