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Role of COMT inhibitors as Anti-parkinsonisms
Role of COMT inhibitors as Anti-parkinsonisms
Role of COMT inhibitors as Anti-parkinsonisms
COMT Substrates
L-Dopa
+
Catecholamines
COMT 3-OMD
SAM SAH
x
DDCI
Entacapone
Tolcapone Stalevo
Entacapone ( Comtan速)200 mg
8/day
(DDCI)
 a great Reduction
in the manifestations
of parkinsonian
syndrome.
Contraindications :
1) Hypersensitivity.
2) Isocarboxazid (MAOI)
Possible hypertensive.
3) sympathomimetics 
their effect & toxicity.
Tolcapone ( Tasmar速) 100&200 mg
3/day
Structurally and pharmacologically related
to Entacapone but. It causes
Liver toxicity
Role of COMT inhibitors as Anti-parkinsonisms
1-Diarrhea.
2- Vivid dreams and visual hallucinations.
3- Drowsiness.
4- Urine discoloration (orange).
5- Dyskinesias.
6- nausea and vomiting.
7-Tolcapone  liver toxicity.
Role of COMT inhibitors as Anti-parkinsonisms
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Role of COMT inhibitors as Anti-parkinsonisms