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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) Lamotrigine is a glutamate receptor antagonist.
 
        B) Tiagabine is indicated for treatment of partial seizures.
 
        C) Topiramate causes reduction of sodium currents.
 
        D) Carbamazepine is a glutamate receptor antagonist.
 
        E) Valproic acid is a known teratogen, or evidence for its teratogenicity exists.
 

 


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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) Lamotrigine is a glutamate receptor antagonist.

This answer is incorrect.


The statement, "Lamotrigine is a glutamate receptor antagonist." is true.
Lamotrigine causes reduction of sodium currents, causes increase of GABA-mediated currents, is a glutamate receptor antagonist, is indicated for treatment of partial seizures, is indicated for tonic-clonic, is indicated for treatment of atonic seizures, is indicated for treatment of tonic seizures, is indicated for treatment of myoclonic seizures, is indicated for treatment of Lennox-Gastaut syndrome, is metabolized primarily in the liver, and is excreted in breast milk.  (See References)

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B) Tiagabine is indicated for treatment of partial seizures.

This answer is incorrect.


The statement, "Tiagabine is indicated for treatment of partial seizures." is true.
Tiagabine causes reduction of sodium currents, is indicated for treatment of partial seizures, is metabolized primarily in the liver, and is approved as adjunct therapy only.  (See References)

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C) Topiramate causes reduction of sodium currents.

This answer is incorrect.


The statement, "Topiramate causes reduction of sodium currents." is true.
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) Carbamazepine is a glutamate receptor antagonist.

This answer is correct.


The statement, "Carbamazepine is a glutamate receptor antagonist." is false.
Carbamazepine causes reduction of sodium currents, 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, is metabolized primarily in the liver, induces hepatic enzymes, is a known teratogen, or evidence for its teratogenicity exists, is associated with an increased risk of spina bifida if taken during pregnancy, is excreted in breast milk, must be started at a low dose, may exacerbate absence seizures, has been shown in comparative studies to be one of the two safest of the older AEDs, and is a drug for which the AAN recommends patients stick to one manufacturer's preparation, as evidence exists that there are differences between generic and brand name preparations.  (See References)

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E) Valproic acid is a known teratogen, or evidence for its teratogenicity exists.

This answer is incorrect.


The statement, "Valproic acid is a known teratogen, or evidence for its teratogenicity exists." is true.
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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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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