What Is the Mechanism of Action of an Ophthalmic Topical

question 26

Multiple Choice

What is the mechanism of action of an ophthalmic topical anesthetic agent?

• A)Acting at the systemic level,they block the effects of histamine release,thereby blunting its symptoms and decreasing the sensation of pain.
• B)Acting locally,they block initiation and conduction of nerve impulses by decreasing the neuronal membrane's sensitivity to sodium ions,thereby decreasing the sensation of pain.
• C)Acting at the cellular level,they inhibit dihydrofolate synthesis,thereby decreasing the sensation of pain.
• D)Acting at the systemic level,they prevent the protein synthesis required for sodium ion transport,thereby decreasing the sensation of pain.

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