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antiepileptic medications

Topic: Pathology

Created on Saturday, September 2 2006 by

Last modified on Saturday, September 2 2006.

Which of the following is most accurate regarding antiepileptic medications?

 
        A) Zonisamide causes reduction of T-Calcium currents.
 
        B) Valproic acid induces hepatic enzymes.
 
        C) Clonazepam is metabolized primarily by the kidney.
 
        D) Levetiracetam causes reduction of sodium currents.
 
        E) Zonisamide is a glutamate receptor antagonist.
 

 


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This question was created on September 02, 2006 by .
This question was last modified on September 02, 2006.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Zonisamide causes reduction of T-Calcium currents.

This answer is correct.


The statement, "Zonisamide causes reduction of T-Calcium currents." is true.
Zonisamide causes reduction of sodium currents, causes reduction of T-Calcium currents, is indicated for treatment of partial seizures, is metabolized primarily in the liver, is approved as adjunct therapy only, and is a known teratogen, or evidence for its teratogenicity exists.  (See References)

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B) Valproic acid induces hepatic enzymes.

This answer is incorrect.


The statement, "Valproic acid induces hepatic enzymes." is false.
Valproic acid causes reduction of sodium currents, causes increase of GABA-mediated currents, is indicated for treatement of complex partial seizures, is indicated for tonic-clonic, is indicated for treatment of absence seizures, is indicated for treatment of myoclonic seizures, is metabolized primarily in the liver, is a known teratogen, or evidence for its teratogenicity exists, is associated with an increased risk of spina bifida if taken during pregnancy, and is excreted in breast milk.  (See References)

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C) Clonazepam is metabolized primarily by the kidney.

This answer is incorrect.


The statement, "Clonazepam is metabolized primarily by the kidney." is false.
Clonazepam causes reduction of sodium currents, causes increase of GABA-mediated currents, is indicated for treatment of absence seizures, is indicated for treatment of atypical absence seizures, is indicated for treatment of atonic seizures, is indicated for treatment of myoclonic seizures, is metabolized primarily in the liver, and is a known teratogen, or evidence for its teratogenicity exists.  (See References)

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D) Levetiracetam causes reduction of sodium currents.

This answer is incorrect.


The statement, "Levetiracetam causes reduction of sodium currents." is false.
Levetiracetam works via an unknown mechanism, is indicated for treatment of partial seizures, is metabolized primarily by the kidney, is approved as adjunct therapy only, is excreted in breast milk, has no known significant drug interactions, and has no known significant interactions with other AEDs.  (See References)

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E) Zonisamide is a glutamate receptor antagonist.

This answer is incorrect.


The statement, "Zonisamide is a glutamate receptor antagonist." is false.
Zonisamide causes reduction of sodium currents, causes reduction of T-Calcium currents, is indicated for treatment of partial seizures, is metabolized primarily in the liver, is approved as adjunct therapy only, and is a known teratogen, or evidence for its teratogenicity exists.  (See References)

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References:

1. Browne, T.R., & Holmes, G.L. (2004). Handbook of Epilepsy, 3rd Edition. Lippincott Williams & Wilkins, Philadelphia., Leppik, I.E. (2001). Contemporary Diagnosis and Management of the Patient with Epilepsy, 5th Edition. Handbooks in Health Care, Newtown, Pennsylvania.
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pathology
antiepileptic medications
Question ID: 540025025
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/02/2006
Modified: 09/02/2006
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