Define and discuss local anesthetics as a class of drugs.
View from a printout the molecular formulas of 5 common local anesthetics.
Discuss cocaine as the first, extracted from the coca leaves about 150 years ago, and used as a topical ophthalmic anesthetic.
Discuss the mode of action, blocking sodium channels.
Introduce the process of nociception and nociceptors.
Read patient profile of patient splashed with hydrochloric acid and broken glass.
Explain the relationship of pain to the receptors stimulated and the sensory nerves activated.