types of cholinergic drugs - university of...
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Types of cholinergic drugs1- Direct acting cholinergic drugs2- Indirect acting cholinergic drugs
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Cholinergic drugsThe transmission of cholinergic neurons involve six steps
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Presenter
Presentation Notes
Acetyl coenzyme A or acetyl-CoA is an important molecule in metabolism, used in many biochemical reactions Acetylcholine is synthesized from choline and a donated acetyl group from acetyl-CoA, by the action of choline acetyltransferase(ChAT) Acetylcholine is synthesized from choline and a donated acetyl group from acetyl-CoA, by the action of choline acetyltransferase(ChAT)
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Cholinergic receptors
1- Muscarinic R.
2- Nicotinic R.
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Presenter
Presentation Notes
Pralidoxime is typically used in cases of organophosphate poisoning. The acetylcholinesterase enzyme has two parts to it. An acetylcholine molecule, bound at both ends to both sites of the enzyme, is cleaved in two to form acetic acid and choline. In organophosphate poisoning, an organophosphate binds to just one end of the acetylcholinesterase enzyme (the esteric site), blocking its activity. Pralidoxime is able to attach to the other half (the unblocked, anionic site) of the acetylcholinesterase enzyme. It then binds to the organophosphate, the organophosphate changes conformation, and loses its binding to the acetylcholinesterase enzyme. The conjoined poison / antidote then unbinds from the site, and thus regenerates the enzyme, which is now able to function again.
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Cholinergic Blocking Agents.
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Side effects of Antimuscarinic (Atropine).
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Scopolamine ( L-Hyoscine ).- produce sedation at low doses in contrast to
atropine- At high doses it act like atropine.- Used as antiemetic and prophylactically in motion
sickness either orally or transdermally.
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Mechanism of Action
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