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Phenytoin Administration and Mechanism of Action Quiz

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Phenytoin Administration and Mechanism of Action Quiz

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Questions and Answers

What is the primary mechanism of action of phenytoin?

Enhancement of GABA Ion Channels

Inhibition of Na+ influx

Stabilization and prolongation of the inactive state (correct)

Inhibition of Ca2+ influx

Which neurotransmitter is predominantly affected by phenytoin's mechanism of action?

Dopamine

Serotonin

GABA (correct)

Glutamate

What is the structural feature that distinguishes phenytoin as a hydantoin?

5-membered ring containing 2 nitrogens (correct)

7-membered ring containing 3 nitrogens

6-membered ring containing 1 nitrogen

4-membered ring containing 2 nitrogens

What is the main consequence of inhibiting Na+ influx due to phenytoin usage?

Diminished spread of electrical seizure activity Signup and view all the answers

How does phenytoin affect the generation of action potentials?

Decreases action potential generation Signup and view all the answers

Which ion channels are primarily targeted by phenytoin's mechanism of action?

Na+ channels Signup and view all the answers

What is the significance of phenytoin's poor water solubility?

It leads to precipitation in acidic environments Signup and view all the answers

How does phenytoin differ from carbamazepine in terms of mechanism of action?

Phenytoin inhibits sodium influx, while carbamazepine enhances GABA neurotransmission Signup and view all the answers

What is the major impact of phenytoin on action potentials in nerve cells?

Prolongs the inactive state. Signup and view all the answers

Phenytoin Administration and Mechanism of Action Quiz

Choose a study mode

Podcast

Questions and Answers

What is the primary mechanism of action of phenytoin?

Which neurotransmitter is predominantly affected by phenytoin's mechanism of action?

What is the structural feature that distinguishes phenytoin as a hydantoin?

What is the main consequence of inhibiting Na+ influx due to phenytoin usage?

How does phenytoin affect the generation of action potentials?

Which ion channels are primarily targeted by phenytoin's mechanism of action?

What is the significance of phenytoin's poor water solubility?

How does phenytoin differ from carbamazepine in terms of mechanism of action?

What is the major impact of phenytoin on action potentials in nerve cells?

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