Antidepressant Drugs: Mode of Action and Indications Quiz
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Questions and Answers

What is the mode of action of antidepressants?

  • Increasing the production of dopamine
  • Blocking the action of GABA receptors
  • Inhibiting the reuptake of neurotransmitters (correct)
  • Stimulating the release of serotonin and norepinephrine

What is a potential indication for using antidepressants?

  • Depression with anxiety and panic disorders (correct)
  • Moderate to severe depression only
  • Bipolar disorders only
  • Mild depression only

What is a potential pharmacokinetic characteristic of antidepressants?

  • Poor absorption when taken orally
  • Low lipid solubility leading to poor BBB penetration
  • Short half-life and rapid excretion in urine
  • Metabolism by CYP450 enzymes (correct)

What is a potential side effect of antidepressants related to their anticholinergic activity?

<p>Blurred vision and dry mouth (D)</p> Signup and view all the answers

What is a notable contraindication for using antidepressants?

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

What is a potential effect of abrupt discontinuation of high doses of antidepressants?

<p>Occasional withdrawal syndrome (D)</p> Signup and view all the answers

Which class of drugs is known for blocking norepinephrine and serotonin reuptake into the presynaptic neuron?

<p>Tricyclic antidepressants (TCAs) (B)</p> Signup and view all the answers

What is the main mode of action of selective serotonin reuptake inhibitors (SSRIs)?

<p>Increase concentration of serotonin in the synaptic cleft (B)</p> Signup and view all the answers

Which side effect is associated with tricyclic antidepressants (TCAs)?

<p>Inappropriate antidiuretic hormone (ADH) secretion (SIADH) (A)</p> Signup and view all the answers

What is the pharmacokinetic characteristic of new generation drugs used for depression?

<p>Do not require monitoring due to low toxicity (C)</p> Signup and view all the answers

Which neurotransmitters are mainly affected by monoamine oxidase inhibitors (MAOIs)?

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

What is the primary indication for new generation drugs used in depression?

<p>Depression and anxiety disorders (D)</p> Signup and view all the answers

What is the effect of tricyclic antidepressants (TCAs) on neurotransmitter concentration in the synaptic cleft?

<p>Increase concentration of norepinephrine and serotonin (D)</p> Signup and view all the answers

Which class of drugs is known for down-regulating %-HT1 autoreceptors to increase brain-derived neurotrophic factor (BDNF)?

<p>Selective serotonin reuptake inhibitors (SSRIs) (C)</p> Signup and view all the answers

What is a potential side effect of selective serotonin reuptake inhibitors (SSRIs) that may lead to easy bruising and bleeding?

<p>Decreased platelet function (A)</p> Signup and view all the answers

Flashcards

How do antidepressants work?

Antidepressants work by preventing the reuptake of neurotransmitters, which increases their levels in the synapse.

What are some common uses for antidepressants?

Depression, anxiety, and panic disorders are common conditions where antidepressants are used.

How are antidepressants processed in the body?

Many antidepressants are metabolized by the CYP450 enzymes, which are involved in breaking down drugs in the liver.

What are some possible side effects of antidepressants?

Anticholinergic effects, like blurred vision and dry mouth, can occur due to antidepressants blocking certain receptors.

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When should antidepressants be avoided?

Prostate hyperplasia, an enlarged prostate, is a condition where antidepressants are not recommended due to potential interaction.

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What happens if you stop taking antidepressants suddenly?

Abruptly stopping high doses of antidepressants can lead to withdrawal symptoms like dizziness, nausea, or headaches.

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How do tricyclic antidepressants work?

Tricyclic antidepressants (TCAs) block the reuptake of norepinephrine and serotonin, increasing their levels in the brain.

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How do SSRIs work?

Selective serotonin reuptake inhibitors (SSRIs) primarily increase the concentration of serotonin in the synapse.

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What is a notable side effect of TCAs?

Tricyclic antidepressants (TCAs) can cause a condition called SIADH, which involves inappropriate release of antidiuretic hormone.

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What is special about newer antidepressants?

Newer generation antidepressants are often less toxic and may not require close monitoring.

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How do MAOIs work?

Monoamine oxidase inhibitors (MAOIs) primarily affect the levels of norepinephrine and serotonin in the brain.

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What are new generation antidepressants used for?

New generation antidepressants are commonly used for treating depression and anxiety disorders.

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How do TCAs affect neurotransmitter levels?

TCAs increase the concentration of norepinephrine and serotonin in the synaptic cleft, similar to SSRIs.

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How do SSRIs affect brain growth?

SSRIs downregulate %-HT1 autoreceptors, which can lead to increased levels of BDNF, a brain growth factor.

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What is a potential side effect of SSRIs related to bleeding?

SSRIs can interfere with platelet function, leading to a higher risk of bruising and bleeding.

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