Definition

Noun: A nontricyclic antidepressant drug is a member of a broad class of antidepressant medications. These drugs are defined by what they are not: they are not tricyclic antidepressants (TCAs). Furthermore, their primary mechanism of action does not involve the inhibition of the enzyme monoamine oxidase (MAO). This class includes several modern antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors) and SNRIs (Serotonin-Norepinephrine Reuptake Inhibitors).

Usage Examples

• The doctor prescribed a nontricyclic antidepressant drug to treat her depression, hoping it would have fewer side effects than the older tricyclic medications.
• Fluoxetine (Prozac) is a well-known example of a nontricyclic antidepressant drug.
• His treatment plan involved switching from a tricyclic to a nontricyclic antidepressant drug.

Advanced Usage

• The term is often used in medical and pharmacological contexts to categorize and differentiate antidepressant agents based on their chemical structure and mechanism of action.
• It serves as an umbrella term for antidepressants developed after the first-generation tricyclics and MAO inhibitors.

Variants and Related Words

• Nontricyclic antidepressant (noun): A more common, shortened form of the term.
• SSRI (Selective Serotonin Reuptake Inhibitor) (noun): A major subclass of nontricyclic antidepressants (e.g., sertraline, citalopram).
• SNRI (Serotonin-Norepinephrine Reuptake Inhibitor) (noun): Another major subclass (e.g., venlafaxine, duloxetine).
• Second-generation antidepressant (noun): A related descriptive term often used synonymously with nontricyclic antidepressants.

Synonyms

• Atypical antidepressant (Note: This is a broader, less precise synonym that can sometimes include other novel agents.)
• Second-generation antidepressant

Antonyms

• Tricyclic antidepressant (TCA) (noun): The class of older antidepressants from which nontricyclics are distinguished.
• MAO inhibitor (MAOI) (noun): Another older class of antidepressants whose mechanism nontricyclics do not share.

Noun

1. a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO