Antidepressant drugs such as Nardil or Parnate, that block the activity of an enzyme that breaks down serotonin and noradrenaline are ______.

Question

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Nardil and Parnate are examples of monoamine oxidase inhibitors (MAOIs), which block the activity of the enzyme monoamine oxidase that breaks down neurotransmitters like serotonin and noradrenaline. Tricyclic antidepressants also increase levels of these neurotransmitters, but they act by blocking their reuptake rather than inhibiting the enzyme. Serotonin-uptake inhibitors (such as Prozac) increase serotonin levels by blocking its reuptake, but they do not affect noradrenaline. Beta blockers are a different class of drugs that act on the sympathetic nervous system to decrease heart rate and blood pressure, and are not used as antidepressants.

Antidepressant Drugs Such as Nardil or Parnate, That Block the Activity