Cholinergic & Anticholinergic Flashcards
located in the CNS and gastric parietal cells
M1
increase gastric acid - HCL
CNS excitation
M1
M1 and M3 have what mechanism
Gq - IP3, DAG - increase in Ca2+ concentration
M2 mechanism
Gi - inhibits adenyl cyclase, decrease cAMP and opening of K+ channel
located in heart - SA and AV node, presynaptic terminal
M2
decrease rate of impulse generation, velocity of conduction decreased, contractility decreased
M2
located in smooth muscles in exocrine glands, GIT, genitourinary system, constrictor pupilae, glands
M3
increase in exocrine secretion, smooth muscle contraction, miosis
M3
binds to activate endothelial NO synthase, vasodilation due to release fo EDRF - increases cGMP to dephosphorylate myosin LC
acetylcholine
M3 stimulation increases bowel movements and bladder contractions - emptying
bethanechol
treats paralytic ileus - reduced bowel movements; urinary retention
bethanechol
SE: CNS stimulation, miosis, bradycardia, bronchoconstrictor, accommodation of near vision, abdominal cramps, flushing, salivation
bethanechol
Contraindications: asthma, peptic ulcer, MI
bethanechol
increases aqueous humor outflow; increases peristalsis and treats glaucoma
carbachol
stimulates bronchial construction and used in diagnosis of asthma
methacholine
M3 stimulation - increase salivation, lacrimation, increase aqueous humor outflow (glaucoma); ciliary muscle - contraction
pilocarpine
used to treat xerostomia, stimulates salivary secretion in post op, open angle glaucoma, iris-cyclitis adhesions
pilocarpine
selective muscarinic: found in mushrooms, responsible for cholinergic symptoms in mushroom poisoning
muscarine
neurally occurring tertiary amine that is well absorbed and crosses BBB
nicotine
synthetic partial agonist at alpha 4 beta 2 subtype nicotinic receptors used in the treatment of smoking cessation
varenicline
stimulates M3 (salivary glands) - increase secretion; used to treat xerostomia in chemo patients and sjogren syndrome
cevimeline
M3 - enters CNS; penetrates cornea
Treats: open angle glaucoma and atropine overdose antidote (IV-Belladonna poisoning)
physiostigmine