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14 Cards in this Set
- Front
- Back
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What effect will M antagonists have on the eye?
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mydriasis, cycloplegia
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besides M antagonists, what other drugs will causes mydriasis?
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alpha1 agonists
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M antagonist acting on the ciliary m. will cause the lens to be fixed for __________ vision
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far
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What is the advantage of using ipratropium bromide over atropine (think charge)?
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ipratropium bromide doesn't cross BBB ---> no CNS side effects
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Which two muscarinic antagonists would be prescribed for the treatment of asthma/COPD?
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ipratropium bromide or tiotropium bromide
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are muscarinic antagonists more effective for asthma or COPD? why?
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COPD; Asthma may have minimal bronchoconstriction due to parasympathetic activity (beta2 agonists more effective)
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What are benefits of using scopolamine pre-operatively?
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less oral secretions, sedation, amnesia
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Why does atropine have no effect on ventricular arrythmias?
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little M receptors on ventricals
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What is the mechanism for reducing motion sickness by using scopolamine?
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blocks M receptor activation on medulla by the vestibular apparatus
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How would muscarinic blockers make a patient 'blind as a bat'?
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cycloplegia causes lens to be fixed for far vision
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how would muscarinic antagonists make a patient 'dry as a bone'?
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M blockers decrease gland secretions 'cotton mouth'
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how would muscarinic blockers make a patient 'red as a beet'?
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lack of sweating
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how would muscarinic blockers make a patient 'mad as a hatter'?
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CNS side effects (delirium w/ atropine)
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What is a contraindication for using ocular M blocker?
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narrow angle glaucoma
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