Psychopharmacology Ethical Considerations Quiz
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Questions and Answers

What is the primary function of the serotonin transporter?

  • To facilitate the release of serotonin into the synaptic cleft.
  • To increase the transcription rates of the SLC6A4 gene.
  • To reuptake serotonin into the presynaptic neuron. (correct)
  • To inhibit the reuptake of serotonin into the presynaptic neuron.
  • Which genetic variant of the SLC6A4 promoter results in lower transcription rates?

  • The L allele.
  • The 44 base pair insertion.
  • Both the S and L alleles.
  • The S allele. (correct)
  • What is the impact of the S allele on the effectiveness of SSRI treatment?

  • It increases the response rate, resulting in more effective SSRI treatment.
  • It decreases the response rate, resulting in lower rates of remission. (correct)
  • It has no impact on patient response to SSRI treatment.
  • It leads to more active sites for SSRIs, enhancing their efficacy.
  • How does the CYP2D6 enzyme affect the metabolism of atomoxetine?

    <p>Ultra-rapid metabolizers (UMs) are likely to experience reduced efficacy, while poor metabolizers (PMs) have higher rates of adverse events. (C)</p> Signup and view all the answers

    What is the significance of the FDA labeling information regarding atomoxetine and CYP2D6 poor metabolizers?

    <p>It highlights the risk of increased rates of adverse events in CYP2D6 poor metabolizers and recommends dosing adjustment. (D)</p> Signup and view all the answers

    What is considered an ethical imperative for practitioners in any practice?

    <p>Being sensitive to diversity and demonstrating multicultural competence. (A)</p> Signup and view all the answers

    When a discrepancy arises between a practitioner's style and a patient's assumptions, what should be considered?

    <p>It could be based on cultural background differences. (B)</p> Signup and view all the answers

    What is a primary consideration for practitioners regarding the power they hold as prescribers?

    <p>The potential for misuse through an authoritarian approach. (B)</p> Signup and view all the answers

    Why should self-disclosure by the practitioner be approached carefully within certain cultural groups?

    <p>It may not be acceptable or may create discomfort. (B)</p> Signup and view all the answers

    How should informed consent be regarded in the context of psychopharmacology?

    <p>An ongoing process, not a one-time event. (B)</p> Signup and view all the answers

    What is one of the questions that arises in the ethical use of psychopharmacology?

    <p>Is there a risk of harm when not addressing pharmacological issues? (C)</p> Signup and view all the answers

    Why is it crucial to stay informed about the effects of somatic therapies?

    <p>To stay current with evidence based medicine. (A)</p> Signup and view all the answers

    When should psychotropic medications be considered for use?

    <p>When clearly indicated with a strong evidence base. (C)</p> Signup and view all the answers

    What is the term for the existence of two or more distinct forms of a trait arising from a single gene?

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

    Which of the following is a primary function of the CYP450 enzyme system?

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

    Genetic polymorphisms in CYP450 enzymes primarily explain variability in which of the following?

    <p>Drug-metabolizing enzyme activities (C)</p> Signup and view all the answers

    How can variations in drug-metabolizing enzyme activities impact a patient's response to a drug?

    <p>By modifying drug clearance rates and therapeutic effects (A)</p> Signup and view all the answers

    What is a potential clinical consequence of an individual possessing an unusual gene variant for drug-metabolizing enzymes?

    <p>Diminished efficacy or increased toxicity to certain drugs (D)</p> Signup and view all the answers

    The study of "how much drug is in the system" is best described as which of the following?

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

    Using different delivery mechanisms (e.g., IM, transdermal) primarily avoids which process?

    <p>First-pass metabolism (A)</p> Signup and view all the answers

    What impact do variations in pharmacokinetic systems have on drug response, specifically relating to routes of administration?

    <p>Route of administration does not compensate for variations in pharmacokinetic systems. (A)</p> Signup and view all the answers

    Which of the following medications is known to be a substrate of both CYP2D6 and CYP2C9?

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

    Which of the following medications is NOT a known inducer of CYP2C9?

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

    Which of the following medications is known to be a substrate of CYP1A2?

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

    Which of the following substances is NOT a known inhibitor of CYP1A2?

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

    Which of the following substances is NOT a known inducer of CYP1A2?

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

    Which of the following medications is primarily metabolized by CYP2C9?

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

    Compared to extensive metabolizers (EMs), what is the approximate increase in peak concentration of atomoxetine observed in poor metabolizers (PMs) of CYP2D6?

    <p>5-fold (C)</p> Signup and view all the answers

    According to the provided information, how should the initial dose of atomoxetine be adjusted for a CYP2D6 poor metabolizer?

    <p>Initiate at 0.5 mg/kg/day (D)</p> Signup and view all the answers

    What is the primary function of catechol-O-methyltransferase (COMT) in the synaptic cleft?

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

    The Val158Met polymorphism in the COMT gene involves a change in which amino acid?

    <p>Valine to methionine (B)</p> Signup and view all the answers

    Compared with other genotypes, what is the activity level of COMT in Met/Met homozygotes?

    <p>4-5 times lower (A)</p> Signup and view all the answers

    How does the Met/Met genotype affect response to stimulant medications?

    <p>Reduced rate of response (B)</p> Signup and view all the answers

    Which of the following is NOT directly metabolized by COMT?

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

    If a patient is identified as a CYP2D6 poor metabolizer, and is started on atomoxetine at 0.5 mg/kg/day but does not respond, what is the soonest the dose can be increased?

    <p>After 4 weeks (C)</p> Signup and view all the answers

    What is the process called when the activity of a metabolizing enzyme is increased?

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

    What effect does enzyme inhibition have on drug metabolism?

    <p>It increases systemic exposure of a substrate drug. (C)</p> Signup and view all the answers

    Which of the following is a potential consequence of enzyme induction?

    <p>Increased dosage requirements for certain drugs. (D)</p> Signup and view all the answers

    How can drug interactions related to CYP isozymes affect a patient's treatment?

    <p>They may require dosage adjustments or alternative drugs. (A)</p> Signup and view all the answers

    What might occur if one drug inhibits CYP-mediated metabolism of another drug?

    <p>The second drug may accumulate to toxic levels. (B)</p> Signup and view all the answers

    Flashcards

    Multicultural competence

    Understanding diverse social, cultural, spiritual, and sexual backgrounds of patients.

    Personal biases

    Preconceived notions that affect decision-making in patient care.

    Informed consent

    Ongoing process where patients understand treatment risks and benefits.

    Confidentiality

    Protecting patient privacy as a core ethical duty.

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    Self-disclosure

    Sharing personal experiences in a therapeutic context, used sparingly.

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    Cultural background discrepancy

    Differences between practitioner's and patient's cultural norms and beliefs.

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    Evidence-based psychotropics

    Using medications that have solid research support for their effectiveness.

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    Ethical prescribing practices

    Using medications only when indicated, based on patient needs and evidence.

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    SLC6A4 variants

    The gene has two promoter variants: short (S) and long (L).

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    Serotonin transporter function

    The SLC6A4 gene encodes a protein that reabsorbs serotonin into neurons.

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    SSRIs

    Selective serotonin reuptake inhibitors that increase serotonin in synapse.

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    Effects of S allele

    The short allele (S) has lower transcription rates, impacting SSRI efficacy.

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    Atomoxetine metabolism

    Atomoxetine is metabolized by CYP2D6; poor metabolizers face higher risks.

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    Polymorphism

    Occurrence of two or more distinct phenotypes due to genetic variations.

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    CYP450 System

    A family of enzymes involved in drug metabolism, primarily in the liver.

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    P450 Enzyme Alleles

    Genetic variations affecting drug metabolism and patients' responses.

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    Pharmacokinetics

    Study of how drugs move through the body and their concentration over time.

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    Pharmacodynamics

    Study of how drugs affect the body and their mechanism of action at targets.

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    Variant Genotypes

    Genetic variations that result in different levels of enzyme activity affecting drug response.

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    Ethnic Differences in Alleles

    Frequency of drug-metabolizing gene variants varies among ethnic groups.

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    First Pass Metabolism

    Initial metabolism of a drug in the liver before it reaches systemic circulation.

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    CYP Isozymes

    Enzymes that bioactivate substances into active compounds.

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    Drug Interaction

    When one drug affects the metabolism of another, causing changes in effectiveness or toxicity.

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    Enzyme Induction

    An increase in the amount and activity of a metabolizing enzyme.

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    Enzyme Inhibition

    Decreases the rate of drug metabolism, increasing exposure and potential side effects.

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    Therapeutic Implications of Induction

    Induction may require higher doses to maintain effective drug levels in the body.

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    CYP2D6

    A gene that encodes an enzyme important for drug metabolism.

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    Poor Metabolizers (PMs)

    Individuals with reduced enzyme activity that affects drug metabolism.

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    Strattera dosing for PMs

    Initiate at 0.5 mg/kg/day for CYP2D6 PMs; adjust if needed after 4 weeks.

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    COMT

    Catechol-O-methyltransferase; an enzyme that breaks down norepinephrine and dopamine.

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    COMT gene polymorphism (Val158Met)

    A genetic variant leading to amino acid substitution affecting enzyme activity.

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    Met/Met homozygotes

    Individuals with two copies of the Met allele, showing reduced COMT activity.

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    Response to stimulants

    Met/Met carriers show a reduced response to stimulant medications due to low COMT activity.

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    Role of neurotransmitter transporters

    They recycle neurotransmitters or assist in their degradation in the synapse.

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    2D6 Substrates

    Medications processed by the 2D6 enzyme, affecting drug metabolism.

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    2D6 Inhibitors

    Drugs that block the activity of the 2D6 enzyme, increasing other drug levels.

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    2D6 Inducers

    Agents that increase the activity of the 2D6 enzyme, decreasing drug levels.

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    1A2 Substrates

    Medications metabolized by the 1A2 enzyme, essential for their efficacy.

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    1A2 Inhibitors

    Substances that hinder the 1A2 enzyme's function, leading to higher drug concentrations.

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    1A2 Inducers

    Compounds that boost the activity of the 1A2 enzyme, leading to lower drug effectiveness.

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    2C9 Substrates

    Medications that rely on the 2C9 enzyme for metabolism and efficacy.

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    2C9 Inhibitors

    Agents that block 2C9 enzyme activity, impacting drug levels and effects.

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    2C19 Substrates

    Medications metabolized by the 2C19 enzyme, influencing their effectiveness.

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    2C19 Inhibitors

    Substances that suppress the function of the 2C19 enzyme, altering drug effects.

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    Study Notes

    Ethical Issues in Psychopharmacology

    • Sensitivity to diversity is essential in all practices.
    • Multicultural competence is a crucial ethical principle.
    • Understand patients' social, cultural, spiritual, sexual preference, and racial/ethnic backgrounds during assessment, diagnosis, and treatment planning.
    • Consider all aspects of a person's identity when prescribing.
    • Awareness of personal biases and decision-making styles is critical in challenging circumstances.
    • Prescribers should practice an invitational rather than a dictatorial style when communicating with patients.
    • Self-disclosure can be beneficial but is not the primary goal.
    • Confidentiality is a significant ethical responsibility.
    • Prescribers need to frequently highlight the importance of and potential risks to confidentiality.

    Ethical Questions in Psychopharmacology

    • Is the risk of harm greater when psychopharmacological issues are not addressed in the counselling relationship, such as side effects or non-compliance?
    • Should clients be informed about all treatment options, including psychopharmacology?
    • When a diagnosis is unclear, or a practitioner lacks confidence, consultation is essential to ensure appropriate treatment.

    Psychotropic Use - Decisions

    • Providers need to stay current with the effects of somatic therapies and their adverse effects/contraindications.
    • Psychotropics should only be used when clinically indicated and there's strong evidence to support their use, with an evidence-based practice.

    Ethics Considerations

    • Evaluate the appropriateness of referrals, including the reason, recipient, and rationale.
    • Respect clients' rights to refuse treatment and inform them of potential consequences and alternative options.
    • Provide clients with information on potential side effects, expected outcomes, and follow-up.
    • Informed consent is an ongoing process, not a single event.
    • Ensure patients understand the implications of treatment, including potential risks and benefits.
    • Maintain awareness of cultural factors that might influence patient understanding and decision-making regarding consent.

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    Description

    Test your knowledge on the ethical implications in psychopharmacology. This quiz covers key concepts including the serotonin transporter, genetic variants, and the responsibilities of practitioners. Explore the complexities of informed consent and the impact of treatment variations based on genetic factors.

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