Shared Flashcard Set

Details

Cholinergic Antagonists
by pete
63
Medical
Graduate
07/21/2012

Additional Medical Flashcards

 


 

Cards

Term
atropine and most of these are tertiary amine meaning they they are well absorbed in : gut, conjunctiva, possibly skin, and can go to CNS
Definition
Muscarinic antagonists
Term
Muscarinic antagonist that is quaternary amine, therefore does not go in CNS and is developed for more peripheral applications like asthma
Definition
Ipratropium
Term
Antimuscarinic agents like atropine are _____ at muscarinic receptors
Definition
competative antagonists
Term
Tissues most sensitive to atropine
Definition
salivary, bronchial, sweat
Term
tissues least sensitive to atropine
Definition
gastric parietal cells
Term
atropine is a _____ antagonist
Definition
nonselective
Term
pirezepine is 5x more selective for ____ receptors than ___ receptors
Definition
M1, M2
Term
sweat glands have predominant tone of
Definition
Sympathetic (cholinergic)
Term
genital tract has predomoninant tone of
Definition
Sympathetic and Parasympathetic
Term
side effects of antimuscarinics in CNS
Definition
drowsiness, amnesia
Term
at toxic doses ___ and to lesser extent atropine can cause excitment, agitation, hallucinations, and coma
Definition
scopolamine
Term
Antimuscarinics useful in tremor associated w/ ______ because they decrease cholinergic activity in basal ganglia and striatum
Definition
Parkinsons
Term
can precipitate acute glaucoma in a patietn w/ narrow anterior chamber angle
Definition
antimuscarinics
Term
high doess of atropine to heart cause
Definition
tachycardia
Term
low doses of atropine to heart cause
Definition
bradycardia
Term
mechanism by which low doses of atropine cause bradycardia by increasing ACH release (vagal)
Definition
blocking of autoreceptors
Term
Blockade of this receptor has no clinical significance except in ATRIAL FLUTTER OR FIBRILLATION
Definition
M2
Term
PS has little effect on ventricles , mostly on
Definition
Atria
Term
antimuscarnicis usually cause tachycardia on heart and ____ in blood pressure
Definition
no change
Term
Useful for blocking or reversing effects of cholinergic excess in CV system
Definition
antimuscarinics
Term
use of muscarinic antagonists on respiratory system not as good as w/ B adrenergic agnoists and limited to
Definition
inhalation anestheisa to reduce secretions and prevent laryngospasm
Term
seretio nof acid, pepsin, and mucin are reduced but only at ____ doses of antagonist
Definition
high
Term
no significant effects on uterus
useful for treating spasms
may worsen urinary retention
Definition
antimuscarinics
Term
elevation of body temperature in infatnts and chilren is known as this:

occurs by blocking *sympathetic* stimulation of sweat glands (M2, M3)
Definition
atropine fever
Term
can be used to treat parkinsons or drug induced extrapyramidal syndromes
Definition
Benztropine
Term
Can be used to treat parkinsons, and is cogener of benadryl also used for mm pain
Definition
Orphenadrine
Term
For Parkinsons
Definition
Benztropine, Biperiden, Orphenadrine, Trihexyphenidyl
Term
If you want midraiasis w/ no cyclopelgia dont use antimuscarinic use...
Definition
a agonist
Term
Opthalmological disorders:
3-7 days action
Definition
Scopolamine
Term
Opthalmological disorders:
7-10 days action
Definition
Atropine
Term
Opthalmological disorders:
1-3 days
Definition
Homatropine
Term
Opthalmological disorders:
1 day action
Definition
Cyclopentolate
Term
Opthalmological disorders:
.25 day
Definition
Tropicamide
Term
Can be combined w/ sympathomimetic (hydroxyamphetamine) good for short term mydriasis
Definition
Tropicamide
Term
Old school drugs to reduce airway secretions, laryngospasm by irritant anesthetics
Definition
Atropine, Hyoscyamine
Term
antimuscarinic asthma treatment blocks vagal activation of muscarinic receptors
also COPD
Definition
Ipratropium (atrovent)
Term
combines bronchodilator effects of muscarinic block and adrenergic stimulation
Definition
Ipratropium and albuterol (Combivent)
Term
Besides Ipratropium this is an antimuscarinic used for treatment of asthma/COPD
Definition
Tiotropium (Spiriva)
Term
Reflex vagal discharge from pain of MI leads to brady cardia

also intraoperatively vagal reflexes can be stimulated this is indicated for thse two conditions though the amount needs to be just right... if too little can make worse
Definition
atropine
Term
reduce gastric emptying thus can exacerbate eptic ulcers despite reducing gastric secretions
Definition
antimuscarinics
Term
Clinical use for peptic ulcers
Definition
Atropine, Hyoscyamine, Glycopyrrolate
Term
added to diphenoxylate to discourage use of opiate in antidiarrheal
Definition
atropine
Term
Lomotil is
Definition
atropine and diphenoxylate
Term
treats irritable bowel syndrome and spastic colon Dicyclomine and _____
Definition
Hyoscyamine
Term
treats irritable bowel syndrome and spastic colin Hyoscyamine and ____
Definition
Dicyclomine
Term
antimuscarinic to reduce bladder spasms and treat urge incontiance
Definition
Oxybutynin
Term
antimuscarinic to reduce bladder spasms and treat urge incontiance
includes Oxybutynin, Tolterodine and____
Definition
Fesoterodine
Term
antimuscarinic to reduce bladder spasms and treat urge incontiance
includes Oxybutynin, Fesoterodine and____
Definition
Tolterodine
Term
M3 selective antimuscarnics can be better for over active bladder they include Darifenacin (enablex) and ____
Definition
Solifenacin
Term
M3 selective antimuscarnics can be better for over active bladder they include Solifenacin (Vesicare) and ____
Definition
Darifenacin
Term
anti-cholinestearase pesticides + wildmushrooms can cause cholinergic crisis treat w/ tertiary antimuscarnic such as
Definition
atropine
Term
Pralidoximen (PAM) helps regenerate cholinesterase but does not cross blood brain barrier and will not regenerate
Definition
central cholinesterases
Term
rapid onset mushroom poisoning (15-30 min after) caused by
Definition
muscarinic excess
Term
deslayed onset mushroom poisoning is due to mushrooms that damage liver and kidney most likely due to
Definition
Amatoxin
Term
Atropine is only useful in treating this type of musrhoom poisoning
Definition
rapid onset
Term
effect of muscarniic agonists on CV in therapuetic dosages
Definition
bradycardia followed by tachycardia
Term
often symptomatic maintenance is only treatment needed for muscarnic antagonist overdose however if enough cholinesterase inhibition then treat with
Definition
physostigmine
Term
atropine is a very safe drug but is contradited in patients w/
Definition
glaucoma (particuarly narrow angle closure) and can precipiate acute glaucoma

males w/ prostatic hyperplasia (precipitates urinary retention)
Term
only ganglionic blocker available
Definition
Mecamylamine (Inversine)
Term
prevents reflex activity
Definition
Ganlionic blockers
Term
besides mecamylamine (cns) other ganglionic blockers (non cns)
Definition
TEA, hexamethonium, trimethaphan
Term
orphan drug by FDA for Tourettes
Definition
Mecamylamine (Inversine)
Term
useful for lowering blood pressure in emergency cases of acute dissecting aortic aneurysm
Definition
Mecamylamine (Inversine)
Supporting users have an ad free experience!