Unit 2 Flashcards
cholinomimetic that is selective for nicotonic receptors because of extra methyl group used to treat ileus and urinary retention
bethanechol
cholinergic side effects
Salivation Lacrimation Urination Defecation GI distress Emesis
contraindications to cholinomimetics
hyperthyroidism, bradycardia, asthma, peptic ulcer
AchE Inhibitor used in ileus and reversal of neuromuscular blockade w/ SE of skel muscle paralysis if over stimulated
neostigmine
AchE Inhibitor used in glaucoma
physostigmine
v. short acting AchE inhibitor used in differentiating myasthenia gravis from Ach crisis
edrophnium
Blocks muscarinic receptors (blocks parasymp innervation at target organs)
atropine
atropine SEs
cardiac slowing, dry mouth, no sweating, inc HR, palpitations, blurred vision and hyperthermia in kids… “dry as a bone, blind as a bat, red as a beet, mad as a hatter”
antimuscarinic used for motion sickness
scopolamine
antimuscarinic that blocks vagal pathway mediating reflex bronchoconstriction used in asthma or COPD
iptratropium
depolarizing blocker that overstimulates nicotonic receptor, leading to desensitization of muscle unit to further Ach stim (used for brief procedures)
succinylcholine
Blocks vesicle fusion and Ach release on presynaptic terminal by degrading SNAP-25
botox
a1, a2, B1 –> big inc BP
norepi
a1, (a2), B1, B2 –> inc BP
epi
inc NE release
amphetamine
a1
vascular constriction
a2
inhibit NE release
B1
inc HR & contractility, renin secretion
B2
dilate arteries, bronchial relax
D1
dilate renal, mesenteric and cerebral arteries
B2 selective reverses exercise-induced bronchospasm/ asthma
terbutaline
a1 agonist causes reflex bradycardia on rapid withdrawal (used for nasal congestion)
phenylephrine
D1, a1, B1 agonist used in shock
dopamine
non-competitive blocker of a1 & a2 used for raynauds
phenoxybenzamine