FAMILY QUESTIONS WITH CORRECT ANSWER
H1 antagonists adverse effects -
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anssedation, dizziness, incoordination, confusion, fatigue, insomnia, tremors, seizures, n/
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v, and anticholinergic effects.
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H! antagonists drug selection -
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ansCNS depression is most prominent in ethanolamine and phenothiazines (least likely in
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Alkylamines)
H1 antagonist - Alkylamines -
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ansprovide effective H1 blockade with little reduction in alertness. If excessive sedation co
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ntinues a 2nd generation should be used. cx cx cx cx cx cx
What active ingredient do sleep aides contain? -
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ansall sleep aides contain an H1 antagonist; either diphenhydramine or pyrilamine as its ac
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tive ingredient cx
1st generation vs 2nd generation histamine antagonists -
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ans1) 2nd generation produce much less sedation
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2) 2nd generation crosses blood-brain barrier poorly
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3) 2nd generation has a low affinity for H2 receptors of the CNS
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Food/Drug interactions with Fexofenadine (H2 antagonists)? - cx cx cx cx cx cx
ansFruit juices reduce absorption, which reduce therapeutic effects.
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Patient's should not drink fruit juices 4 HRs before dosing and 2 HRs after dosage
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Glucocorticoids MOA #1 - cx cx cx
ans1) glucocorticoids penetrate the cell membrane and then bind with receptors in the cyto
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plasm, thereby converting the receptor from an inactive form to an active form.
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Glucocorticoids MOA #2 - ans2) receptor- cx cx cx cx cx
steroid complex migrates to the cell nucleus, where it binds to chromatin in DNA, thereby alt
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ering activity of target genes.
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Pharmacologic effects of glucocorticoids - metabolism - cx cx cx cx cx cx
ansglucose levels rise, protein synthesis is suppressed, fat deposits are mobilized
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Pharmacologic effects of glucocorticoids - electrolytes - cx cx cx cx cx cx
anshigh dose can inhibit intestinal absorption of calcium; rarely can induce sodium retentio
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n or potassium
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