Opiates & Analgesics Flashcards
the point the individual perceives the response as pain
pain threshold
The ability of the individual to experience pain without initiation of pain responses
Pain tolerance
Painful stimuli are sensed by peripheral nociceptive of these types of neurons via ion channels that convert stimuli to membrane potential changes
C or Aδ
Mu receptor that functions in analgesia and euphoria
Mu1
Mu receptor that functions in bradycardia and respiratory depression
Mu2
Component of G protein that modulates ion channels in opioids
Beta and gamma
What effect do opioids have on BP?
Causes hypotension
(at moderate to high doses)
What effect do opioids have on heart rate?
Causes bradycardia
(at moderate to high doses)
What effect do opioids have on repiration?
Depress respiration
Opioids can cause respiratory depression and cerebral vessel dilation, so they are contraindicated in this
Head trauma or severe brain injury
Opioid use is cautioned in patients with asthma or COPD due to the release of this
Histamine
Opioids chronically suppresse hypothalamic-pituitary-gonadal axis to trigger this
Opioid-induce androgen deficiency (OPIAD)
Opioids chronically suppress this to trigger opioid-induced androgen deficiency (OPIAD)
Hypothalamic-pituitary-gonadal axis
No opioid tolerance develops to either of these effects
Miosis and constipation
Peripheral opioid antagonist that is administered orally
Naloxegol
Peripheral opioid antagonist that is a subcutaneous injectable
Methylnaltrexone
Naloxegol and Methylnaltrexone are antagonists to this
Peripheral opioid antagonists
Benzodiazepines should not be used with these drugs due to profound sedation, respiratory depression, coma and risk of death
Opiates
This type of drug should not be used with opiates due to profound sedation, respiratory depression, coma and risk of death
Benzodiazepines
Is dependence likely when morphine is used for pain?
Rare
Does meperidine have a short or long duration of action?
Short
Meperidine is converted to this product that is not conjugated, non-analgesic, proconvulsant, and hallucinogenic
Normeperidine
Normeperidine is a product of biotransformation of this drug
Meperidine
Is Normepederidine (a product of biotransformation of meperidine) analgesic?
No