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29 Cards in this Set
- Front
- Back
Inhibit synaptic activity of primary afferents and spinal cord pain transmission neurons
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Ascending pathways
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Activation of these receptors close Ca2+ ion channels to inhibit neurotransmitter release
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Presynaptic mu, delta, and kappa receptors
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Activation of these receptors open K+ ion channels to cause membrane hyperpolarization
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Postsynaptic Mu receptors
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Tolerance to all effects of opioid agonists can develop except to
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Miosis and constipation
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All opioids except this agent (which has a muscarinic blocking action) cause pupillary constriction
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Meperidine
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SE of all opioid analgesics
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dependence, withdrawal syndrome, sedation, euphoria, respiratory depression nausea and vomiting, constipation, biliary spasm, increased ureteral and bladder tone, and reduction in uterine tone (hyperparasympathetic tone)
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Strong opioid agonists
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Morphine, methadone, meperidine, fentanyl, levorphanol, and heroin
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Opioids used in anesthesia
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Morphine and fentanyl
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Opioid agonist used in the management of withdrawal states because of its long duration of action
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Methadone
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Opioid available trans-dermally
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Fentanyl
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Opioid that can be given PO, by epidural, and IV, which helps to relieve the dyspnea of pulmonary edema
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Morphine
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Use of this opioid with MAOI can lead to hyperpyrexic coma, and with SSRI's can lead to serotonin syndrome
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Meperidine
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Moderate opioid agonists
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Codeine, hydrocodone, and oxycodone
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Weak opioid agonist, poor analgesic, its overdose can cause severe toxicity including respiratory depression, circulatory collapse, pulmonary edema, and seizures
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Propoxyphene
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Mixed opioid agonist-antagonist, considered a strong analgesic, has a long duration of action and is resistant to naloxone reversal
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Buprenorphine
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Opioid antagonist that is given IV for overdose and has short DOA
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Naloxone
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Opioid antagonist that is given orally in alcohol dependency programs
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Naltrexone
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These agents are used as antitussive
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Dextromethorphan, Codeine
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These agents are used as antidiarrheal
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Diphenoxylate, Loperamide
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ingestion of EtOH w/ these opioids causes a major increase in plasma drug levels
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hydromorphine, oxymorphine
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opioid whos metabolite can cause seizures at high plasma levels
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meperidine
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opioid receptor responsible for respiratory depression effects
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mu
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opiod receptor involved in sedaitive actions
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kappa
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opiod analgesics are relatively contraindicated:
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head injuries, pregnancy?
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opiod action on biliary tract, ureteral and bladder sphincters, and uterus (except w/meperidine)
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increases biliary contraction, increases ureteral and bladder shincter tone, and decreases uterine tone
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describe the opioid abstinence syndrome seen with abrupt withdral after physical dependance
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rhinorrhea, lacrimation, chills, goosebumps, muscle aches, diarrhea, yawning, anxiety, hostility
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over-the-counter antitussive w/toxicities including hallucinations, confusion, excitation, nystagmus, seizures, coma, decreased respiration
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dextromethorphan (robotussin, ect.)
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opioid overdose 'triad'
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pupillary constriction, comatose, respiratory depression
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opioid agonists
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naloxone, nalmefene, naltrexone
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