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40 Cards in this Set
- Front
- Back
Name some cholinesterase inhibitors(reversible)
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Physostigmine
Neopstigmine Pyidostigmine Edrophonium Carbaryl Donespexil Galantamine Rivastigmine |
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Cholinesterase Inhibitors(Irreversible Organophosphates)
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Echothiophate, Parathion, malathion, chlorpyrifos, VX, Sarin
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What symptoms do cholinergic agonists treat?
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GI Atony
Non-Obstructive Urinary Bladder Atony Ophthalmic Disorders(gluacoma) Myasthenia Gravis Alzheimers Disease Xerostomia(dry mouth) |
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Cholinergic agoinists treat emergencies like?
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Supraventicular Tachycardia
Antimuscarinic induced ophthalmic disorders Reversal of effects of non depolarizing neuromuscular blocking druges. |
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What is Ach a transmitter of
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Postsynaptic PNS Neurons
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M1
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Neural CNS and Ganglia
Decrease IP3 and DAG Modifies Neurotransmission |
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M2
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SA and AV nodes
Increase K, decrease cAMP Slow Heart Rate |
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M3
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Glandular
Decrease IP3 and DAG Contraction of smooth muscle and secretions of glands |
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Are muscarinic agonists selective?
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No
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Which is less susceptable to Ache breakdown?
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Carbachol
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Which is selective only for GUt an Bladder?
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Bethanechol
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Pilocarpine
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Muscarinic agonist. Tertiary N. Penetrates membranes. eye topical
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Miotic
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Pilocarpine and carbachol
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Myiadratic
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atropine
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Postoperative abdominal distension
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Bethanechol
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Urinary Retention
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Bethanechol
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Diagnosis of bronchial asthma
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Methacholine Aerosol
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Xerostomia(SjOgrens Syndrome)
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Pilocarpine
and Cevimeline |
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Toxicity Musc agonists
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Syncope
Flushing MI Salivation lacrimation GI Asthma Miosis |
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Acetylchoinesterase(ACHE, TRUE)
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Neurons.skeletal muscles.rbc.hydrolizes ach and methacholine.
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Butyrylcholinesterase(Psuedo)
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Plasma.neuroglia.GI.Inhibition NOT correlated with cholinergic effect.Broader substrate specificity then AChE.
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Inhibitors of cholinesterases
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Edrophonium
Carbamate inhibitors Galantamine |
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Edrophonium
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IV only.Reversible binding to ACHE.rapidly excreted by kidneys
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NEOSTIGMINE
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Carbamate inhibitor
Charged.oral.nocns. tie up enzyme.quatrinaryN REVERSIBLE |
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Physostigmine
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Carbamate inhibitor
Old.notcharged.gets to cns. tie up enzyme.react slowly with water.tertiaryN.REVERSIBLE |
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Pyridostigmine
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Carbamate inhibitor
quatranary N.longer action.myashtenai gravis. REVERSIBLE |
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Carbyl
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Carbamate inhibitor.head lice
REVERSIBLE |
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Galantamine,Revastigmine,Donepezil
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Alzheimers.not prevenitive.long acting.penetrat bbb
REVERSIBLE |
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Reversible AcHE Inhibitors
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Edrophonium
Neostigmine, Physostigmine, Carbaryl, Pyrostigmine Galantamine |
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Esters of Phosphoric acid(organophosphates)
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Irreversible inhibitors.
Covalent bond |
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Uses of Irr inhibitors
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Meds
Incecticide Headlice Nerve Gas |
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Treat ACh toxicity
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Atropine
Pralidoxime.NMJ.No bbb Artificial respiration. |
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Neostigmine
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Gluacoma
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Atony of smooth msucle of gut and bladder
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Neostigmine
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Glaucoma
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Neostigmine, echothiophate
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Myasthenia gravis
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Neostigmine, Pyridostigmine, Edrophonium.
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Antidiote for curare
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Edrophonium, neostigmine
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Overdose of muscarinic agonists
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atropine, tricyclic antidepressents
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Alzehiemers
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donepezil, galantamine, recastigmine
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Nodal tachycardia and paroxysmal atrial
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Edrophonium
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