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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 statements regarding antiepileptic medications is FALSE?

 
        A) Levetiracetam works via an unknown mechanism.
 
        B) Diazepam is approved as adjunct therapy only.
 
        C) Topiramate causes reduction of T-Calcium currents.
 
        D) Ethosuximide causes reduction of T-Calcium currents.
 
        E) Primidone works via an unknown mechanism.
 

 


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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) Levetiracetam works via an unknown mechanism.

This answer is incorrect.


The statement, "Levetiracetam works via an unknown mechanism." is true.
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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B) Diazepam is approved as adjunct therapy only.

This answer is incorrect.


The statement, "Diazepam is approved as adjunct therapy only." is true.
Diazepam causes reduction of sodium currents, causes increase of GABA-mediated currents, is metabolized primarily in the liver, is approved as adjunct therapy only, is a known teratogen, or evidence for its teratogenicity exists, and is excreted in breast milk.  (See References)

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C) Topiramate causes reduction of T-Calcium currents.

This answer is correct.


The statement, "Topiramate causes reduction of T-Calcium currents." is false.
Topiramate causes reduction of sodium currents, causes increase of GABA-mediated currents, works via an unknown mechanism, is indicated for treatment of partial seizures, is indicated for tonic-clonic, is indicated for treatment of Lennox-Gastaut syndrome, is metabolized primarily by the kidney, and is excreted in breast milk.  (See References)

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D) Ethosuximide causes reduction of T-Calcium currents.

This answer is incorrect.


The statement, "Ethosuximide causes reduction of T-Calcium currents." is true.
Ethosuximide causes reduction of T-Calcium currents, is indicated for treatment of absence seizures, is metabolized primarily in the liver, induces hepatic enzymes, has leukopenia as a relatively common side effect, has no known significant drug interactions, has no known significant interactions with other AEDs, and is the drug of first choice for patients with absence seizures only.  (See References)

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E) Primidone works via an unknown mechanism.

This answer is incorrect.


The statement, "Primidone works via an unknown mechanism." is true.
Primidone causes reduction of sodium currents, causes increase of GABA-mediated currents, is a glutamate receptor antagonist, works via an unknown mechanism, is indicated for treatement of complex partial seizures, is indicated for treatment of partial seizures, is indicated for tonic-clonic, induces hepatic enzymes, is a known teratogen, or evidence for its teratogenicity exists, and is excreted in breast milk.  (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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