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E
PRESENTED BYMOHIT KUMAR VERMAMO (PHARMACOLOGY) DEPTT. OF Pharmaceutical Science
P I L E P S Y
08/10/2015
Topic is epilepsy
Topic is epilepsy 2
CONTENTWhat Is Epilepsy ?
Types of epilepsy and sub-types…
Symptoms of Epilepsy...
Causes of Epilepsy...
EPILEPSY : MACHNISM OF ACTION ...
Diagnosis...
Epilepsy Safety...
Epilepsy and Pregnancy...
CLASSIFICION OF ANTI-EPILEPTIC DRUGS...
Choise of anti-epileptic drugs...
Newer Drugs...
Drugs Mode of action...
Reference ...
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What Is Epilepsy ?Epilepsy is a defined as disorder of neurological condition and
problem with the brain’s electrical system. Electrical impulses cause
brief changes in movement, behavior, feeling. These events, known
as seizures, may last from a few seconds to a few minutes.
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Topic is epilepsy
TYPES OF EPILEPSY AND SUB TYPES
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1. Generalized Tonic-Clonic SeizuresGeneralized tonic clonic seizures are the most easily recognized. They usually begin
with a stiffening of the arms and legs, and are followed by jerking motions. These
convulsions can last up to 3 minutes. After having one, a person may be tired and
confused. This type of seizure involves both sides of the brain.
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PartialSeizuresIn partial seizures, just one side of
the brain is affected. A person having
a simple partial seizure may have
jerking motions or hallucinations.
When having a complex partial
seizure, a person may wonder,
mumble, smack their lips, or fumble
with their clothes. He or she may
appear to be conscious .08/10/2015
Topic is epilepsy 8
Symptoms of Epilepsy
Epilepsy is widely known for causing
convulsions,
• Sudden Un-controlled
movements.
• Loss of consciousness.
•Fainting.
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Causes of Epilepsy•Head injury
•Brain infection
•Oxygen deprivation
•Trauma
•Confussion, depressed
• skull fractures.
•Brain tumors (including tuberculoma),
•Drug withdrawal,
e.g. CNS depressants .
•Fever in children (febrile convulsion).
•Hypoglycemia08/10/2015
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EPILEPSY : MACHNISM OF ATION SEIZURES Anti -epileptic drug(ESLICARBAZEPINE ACETATE)
1. NEURONS
2. ACTION POTENTIAL ACROSS CELL SURFACE OF Na+ IONS
3. Action potential
4. Active channels
5. INACTIVATED CHANNELS
6. Na+ CHANNEL ACTIONS
7. NEURONE FIRRING
8. Dipolarised Na+ channel
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Topic is epilepsy
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Diagnosis: Brain Scan And Diagnosis: EEG
Diagnosis: Brain Scan
Detailed images of the brain from CT: computed tomography or MRI: Magnetic Resonance Imaging scans can help doctors rule out
tumors or blood clots as a cause of seizures. A CT scan is a powerful type of X-ray, and an MRI uses magnets and radio waves to make
pictures. This information will help your doctor come up with the best treatment plan for you.
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Diagnosis: EEG An EEG (Electroencephalogram) can confirm a diagnosis and give more information about your seizures. It’s a painless procedure that records the brain’s electrical activity as wavy lines. The pattern changes during a seizure and may show which part of the brain is affected. That can help guide treatment.
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Epilepsy Safety Precautions
Because seizures often strike without warning, certain activities can be dangerous. Losing consciousness while swimming or even taking a bath could be life-threatening. The same goes for many extreme sports, such as mountain climbing. Most states require you to be seizure-free for a certain amount of time before driving a car.
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Treatment: Surgery
If you have partial seizures, surgery may stop them. If the medical team
can determine that your seizures always begin in a single area of the brain,
removing the area may stop them or make them easier to manage. Surgery
may also treat conditions that cause the seizures, such as a brain tumors.
Treatment: Medication- Anti-seizure , anti -epileptic drugs are the most common
treatment for epilepsy.
Topic is epilepsy 15
Epilepsy and Pregnancy
In most cases, it is safe for women with
epilepsy to become pregnant. More than 90% of
babies born to women with epilepsy are
healthy. But if you're planning to get pregnant,
talk to your doctor first. Anti-seizure drugs can
cause risks for infants, and some have more
risks than others. You may need to change or
adjust your medication.
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CLASSIFICION OF ANTI-EPILEPTIC DRUGS
CLASS DRUGSBarbiturate Phenobartitone Deoxybarbiturate PrimidoneHydantoin Phenytoin Iminostilbene Carbamazepine Succinimide EthosuximideAliphatic carboxylic acid Valproic acid Benzodiazepines DiazepamPhenyltriazine Lamotrigine Cyclic GABA analogue GabapentinNewer drugs Zonisamide,Topiramate
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Choise of epileptic drugsDrugs Seizure disorderCarbamazepine or
Valproate orPhenytoin orPhenobarbital
Tonic-clonic (Grand mal)Drug of Choice
Topiramte Lamotrigine (as adjuvant or alone)
Gabapentin (as adjuvant)
Alternatives:
Carbamazepine or Topiramte or Phenytoin or
Valproate
Partial (simple or complex) Drug of choice
Phenobarbital Lamotringine (as adjuvant or alone) Gabapentin (as adjuvant )
Alternatives:
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Treatment cont,d
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Valproate or Ethosuximide
Absence ( petit mal) Drug of choice
ClonazepamLamotrigine
Alternatives:
Valproate Myoclonic, Atonic Drug of choice
Clonazepam Alternatives:
Diazepam, i.v.or Phenytoin, i.v. or Vaproate
Status EpilepticusDrug of choice
Phenobarbital, i.v Alternatives:Diazepam, rectal*Diazepam ,i.vValproate
Febrile Seizures
* Preferred
Topic is epilepsy 19
Topiramate
Vigabatrin,
Levetiracetam, Lamotrigine,
Zonisamide, Lacosamide, Rufinamide
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Newer Drugs
Topic is epilepsy 2008/10/2015
Mode Of Action (MOA)Topiramate: It is a sulphamate substituted monosaccharide, a weak carbonic anhydrase inhibitor has broad spectrum anti-convulsant activity. It appear to act by multiple machanisms:1. Prolongation of Na+ channel inactivation, 2. GABA potentiation,3. Neuronal hyperpolarization through certain
K+ channels.Indications: Topiramate is a useful adjuvant in refractorypartial or generalized epilepsy and other epileptic syndromes
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Zonisamide: 1.Weak carconic anhydrase inhibitory action that
modified max. Electroshock seizures and inhibits kindled seizures
2. It has also been found to suppress T-type of Ca+ currents in certain
neurons.
Tiagabine: It’s neuronal inhibitor by depressing GABA trasportor
GAT-1 which remove synapticalliy released GABA into neurones
and glial cells
Topic is epilepsy 22
REFERENCES By-
1. Ferrándiz-Pulido C, García-Fernández D, Domínguez- Sampedro P,
García-Patos V. Stevens-Johnson syndrome and toxic epidermal necrolysis
in children: a review of the experience with paediatric patients in a
university hospital. J Eur Acad Dermatol Venereol.
2. Brunklaus A, Ellis R, Reavey E, Forbes GH, Zuberi SM. Prognostic,
clinical and demographic features in SCN1A mutation-positive Dravet
syndrome. Brain.
3. K.D. Tripathi, Essentials Medical Pharmacology ” seventh edition”-
2013 page no. 411-416.
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