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10 Cards in this Set
- Front
- Back
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What are the seven categories of respiratory agents?
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1. Antihistamines
2. Nasal decongestants 3. Antitussives 4. Expectorants 5. Bronchodilators 6. Mast cell stabilizers 7. Antileukotrienes |
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Histamine causes:
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- Decreased BP
- Increased body secretions - Increased edema - Increased vasodilation |
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Stimulation of H1 receptors causes:
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- Smooth muscle contraction in stomach and lungs
- dilates capillaries |
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Stimulation of H2 receptors causes:
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- Accelerated HR
- Accelerated gastric acid production |
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The release of histamine causes: (4 responses)
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- Dilates arterioles
- An inflammatory response - Itching and hives - Increased mucous production |
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The two types of antihistamines are:
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- H2 antagonists (H2 blockers)
- H1 antagonists (H1 blockers) |
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Do antihistamines work by direct or indirect action?
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Direct action
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Why do you need to give antihistamines early?
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Because if you are too late, histamines are already bound to the receptors, and there is no way to "kick them off"
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What are three examples of 1st generation antihistamines?
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1. diphenhydramine (benadryl)
2. chlorphenamine (chlor-trimeton) 3. meclizine (dramamine) |
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What are the side effects of 1st generation antihistamines?
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- profound drowsiness
- motor impairment - dry mouth - flushed skin - tachycardia - blurred vision - light sensitivity - pupil dilation - urinary retention - constipation |
