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Muscarinic Blockers
Pharmacology
38
Medical
Professional
09/05/2011

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Cards

Term
2 types of anti-muscarinics
Definition
Natural alkaloids
Quaternary amines
Term
Natural alkaloid absorption and distribution
Definition
tertiary drug
cross BBB (Scoploamine)
Term
Quaternary amines (Ipratropium)
Definition
poorly absorbed
does NOT cross BBB- little CNS effects
Term
Musc. blocker Mech of Action
Definition
less effective against ACh released at effector cells

selective for mAChR over nicotinic (exception-QUATERNARY)
Term
This is highly sensitive to atropine
Definition
salivary secretion
Term
this is relatively insensitive to atropine
Definition
Gastric secretion
Term
Intermediate dose of Atropine produces
Definition
drowsiness, impaired memory and concentration
Term
High dose of Atropine produces
Definition
confusion, excitement, hallucination, convulsions
Term
Toxic doses of Atropine
Definition
paralysis, coma, resp. failure, circ. collapse
Term
Common dose of Scopolamine
Definition
drowsiness, amnesia, fatigue, and reduction in REM sleep
Term
higher dose of scopolamine
Definition
toxic doses atropine
Term
This is used to treat motion sickness
Definition
Scopolamine
Term
Atropine effect on pupillary sphincter
Definition
mydriasis and photophobia
Term
Atropine effects on Ciliary muscle
Definition
cyclopegia, blurred vission, incr. resistance to aqueous outflow
Term
atropine effects on lacrimal glands
Definition
decreased tear production
Term
muscarinic blocker LOW dose on heart
Definition
decrease in HR; High dose-->TACHYCARDIA, BP same
Term
Atropine effect on vasculature
Definition
cutaneous vasodilation
hyperthermia- from decreased sweating
Term
Atropine on respiratory system
Definition
M3- dilation and decr secretion
M2- opposite
Really helpful for COPD patients
Term
Atropine on GI
Definition
causes dry mouth; opposite of PS
Term
Atropine on Sweat Glands
Definition
low doses- inhibit sweating
higher doses- increases body temperature
Term
Atropine has a long half life in which organ
Definition
Eye- cyclopegia
used to examine disorders of accomodation
Term
Quaternary amine drugs
Definition
Ipratropium and Tiotroprium
Term
Inhaled quaternary amine drugs do what on resp tract
Definition
minimize systemic side effects
Term
Ipratropium PCKN
Definition
does NOT impede mucociliary transport
blocks ACh (M2)
Term
Tiotropium PCKN
Definition
Prefers M1/3 over 2
Longer duration of action
Term
Two drugs used urologically
Definition
Oxybutynin and tolterodine
Term
Side effects of Oxybutynin
Definition
dry mouth and dry eyes
Term
Tolterodine
Definition
slight pref to M2 receptors
relaxation is mediated more by M3 receptors.
Term
This urological drug reduces dry mouth compared to the other two
Definition
Solifenacin
Term
2 anti-Mus. used in digestive tract
Definition
methscopolamine and pirenzepine
Term
This tertiary drug is used when L-dopa is contraindicated
Definition
benzotropine
Term
Anti-mus on CV
Definition
severe bradycardia, and hypotension
Term
This drug is used IV to decrease upper respiratory secretion
Definition
Glycoyrrolate
Term
Anti-mus contraindications
Definition
closed angle glaucoma, GI obstruction
Term
Anticholinergic poisoning can occur from
Definition
ingestion of nightshade, Jimson weed

OTC abuse of belladonna alkaloids
Term
Opthamology drugs
Definition
Homatropine, Tropicamide

OTC abuse of belladonna alkaloids
Term
Side effects of anti-cholinergics
Definition
Blindness, psychosis, flushed, dry, hot
Term
This drug is absorbed through the skin
Definition
scopolamine
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