DAANCE Pharmacology 2

Question 1

Which benzodiazepine property makes it ideal for producing anterograde amnesia in dental sedation?

Accepted Answer

GABA-A receptor binding, which disrupts hippocampal memory consolidation

Answer

High lipid solubility causing rapid CNS entry and memory disruption

Answer

Alpha-2 adrenergic agonism blocking memory storage pathways

Answer

Anticholinergic properties reducing acetylcholine-dependent memory formation

Question 2

A patient receiving an IV opioid develops pinpoint pupils (miosis). This finding is caused by:

Accepted Answer

Opioid-induced Edinger-Westphal nucleus stimulation causing pupillary constriction

Answer

Sympathetic alpha-1 receptor stimulation causing pupillary dilation

Answer

Direct retinal receptor activation by opioids

Answer

Parasympathetic blockade leading to mydriasis

Question 3

The clinical relevance of a drug context-sensitive half-life in dental sedation is:

Accepted Answer

It predicts recovery time better than elimination half-life for infusions, as it accounts for drug redistribution

Answer

It measures how long the drug remains active in a dental operatory temperature

Answer

It determines the appropriate needle gauge for drug administration

Answer

It calculates the drug potency relative to other agents in the same class

Question 4

Which statement correctly describes the pharmacology of ketamine at low (sub-anesthetic) doses?

Accepted Answer

It provides analgesia and mild sedation (dissociative analgesia) via NMDA antagonism

Answer

It produces sedation equivalent to midazolam without dissociation

Answer

It reliably abolishes protective airway reflexes at low doses

Answer

It causes significant hypotension by blocking adrenergic receptors

Question 5

Methemoglobinemia as a complication of local anesthetic use is MOST associated with:

Accepted Answer

Benzocaine (topical) and prilocaine at high doses

Answer

Lidocaine in normal doses

Answer

Bupivacaine in adults

Answer

Articaine infiltration technique

Question 6

Which pharmacological characteristic explains why IV midazolam has a faster onset than orally administered midazolam?

Accepted Answer

IV administration bypasses gastrointestinal absorption and first-pass hepatic metabolism

Answer

IV administration provides a higher concentration per dose

Answer

IV midazolam is a different chemical formulation with higher potency

Answer

Oral midazolam binds to GI receptors, reducing free drug available for CNS entry