Kappa Opioid Receptors and Analgesics
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Questions and Answers

Which medication is the most effective for symptomatic treatment?

  • Amantadine
  • Istradefylline
  • Levodopa + Carbidopa (correct)
  • Selegiline

What is the minimum amount of carbidopa required to prevent conversion of levodopa outside of the central nervous system (CNS)?

  • 50mg/day
  • 100mg/day
  • 25mg/day
  • 75mg/day (correct)

What is the characteristic feature of long-term treatment with Levodopa/Carbidopa (Sinemet)?

  • Psychotic disorder
  • Dyskinesias
  • Protein restriction
  • Fluctuations in motor function (correct)

What is the recommended approach to combat the 'wearing off' phenomenon in patients on Levodopa/Carbidopa (Sinemet)?

<p>Increase frequency of carbidopa/L-dopa doses (C)</p> Signup and view all the answers

Which of the following is a characteristic of Huntington's Disease?

<p>Uncontrolled movements (A)</p> Signup and view all the answers

Which of the following drugs deplete dopamine and other monoamines from the axon terminus by preventing intraneuronal storage?

<p>Reserpine (A)</p> Signup and view all the answers

Which of the following drugs is a non-competitive NMDA antagonist and can be used alone or in combination with an anticholinesterase for the treatment of moderate-severe Alzheimer's Disease?

<p>Memantine (C)</p> Signup and view all the answers

Which of the following drugs is a monoclonal antibody against aggregated amyloid-beta and reduces plaques in a dose- and time-dependent manner?

<p>Aducanumab (A)</p> Signup and view all the answers

Which one of the following opioids is a partial mu agonist and a kappa antagonist?

<p>Buprenorphine (A)</p> Signup and view all the answers

Which opioid is known for its antimuscarinic effects and potential for producing seizures?

<p>Meperidine (D)</p> Signup and view all the answers

Which opioid is a weak mu agonist and also inhibits the reuptake of serotonin and norepinephrine?

<p>Tramadol (D)</p> Signup and view all the answers

Which opioid antagonist is usually given intravenously and has a short duration of action?

<p>Naloxone (A)</p> Signup and view all the answers

Which of the following is a characteristic of Parkinsonism?

<p>Hypokinesia (slow movements) (C)</p> Signup and view all the answers

Which part of the basal ganglia is responsible for motor control and is affected in Parkinson's Disease?

<p>Substantia nigra (SN) (C)</p> Signup and view all the answers

Which dopamine pathway is primarily affected in Parkinson's Disease?

<p>Nigrostriatal pathway (D)</p> Signup and view all the answers

What is the role of D2 receptors in the indirect pathway of movement control?

<p>Inhibit movement (B)</p> Signup and view all the answers

Which of the following is a side effect of Lecanemab-irmd (Leqembi)?

<p>Hypersensitivity reactions (A)</p> Signup and view all the answers

What is the black box warning for Donanemab?

<p>Increased risk for mortality in older adults with dementia related psychosis (D)</p> Signup and view all the answers

Which opioid receptor is primarily involved in reward (euphoria) and analgesia?

<p>Mu receptor (A)</p> Signup and view all the answers

Which opioid receptor is primarily involved in dysphoria and sedation?

<p>Kappa receptor (A)</p> Signup and view all the answers

Which type of MAO metabolizes NE and 5-HT?

<p>MAOA (A)</p> Signup and view all the answers

Which adverse effect is associated with the use of selegiline?

<p>Insomnia (C)</p> Signup and view all the answers

What is the mechanism of action of muscarinic receptor antagonists?

<p>Modulating cholinergic activity (C)</p> Signup and view all the answers

What is the recommended initial treatment for mild-to-moderate impairment/early Parkinson's disease?

<p>Amantadine (C)</p> Signup and view all the answers

Which of the following strategies can be used to decrease the activation of somatic motor neurons in spasticity?

<p>Decreasing the activity of inhibitory interneurons within the spinal cord (A)</p> Signup and view all the answers

Which muscle relaxant acts as a GABAB receptor agonist and decreases the activity of somatic motor neurons both pre- and post-synaptically?

<p>Baclofen (B)</p> Signup and view all the answers

Which muscle relaxant enhances GABAA receptor activity post-synaptically and provides inhibition of somatic motor neurons?

<p>Diazepam (A)</p> Signup and view all the answers

Which muscle relaxant acts as an alpha2 receptor agonist and is comparable in efficacy to diazepam and baclofen?

<p>Tizanidine (C)</p> Signup and view all the answers

Which centrally acting skeletal muscle relaxant acts primarily in the brain stem, not the spinal cord?

<p>Cyclobenzaprine (B)</p> Signup and view all the answers

Which local anesthetic preferentially binds and blocks sodium channels in their activated and inactivated states?

<p>Local anesthetics preferentially bind and block sodium channels in their activated state (D)</p> Signup and view all the answers

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