Identify the class of drug :
Phenelzine (Nardin)

Explanation

### Step-by-Step Solution:

1. **Identify the Drug**: The drug in question is Phenelzine, which is also known by its brand name, Nardin.

2. **Determine the Purpose of the Drug**: Phenelzine is primarily used as an antidepressant. It helps in treating depression by affecting certain chemicals in the brain.

3. **Classify the Drug**: Based on its usage, Phenelzine falls under the class of drugs known as "monoamine oxidase inhibitors" (MAOIs). MAOIs are a type of antidepressant that work by inhibiting the activity of monoamine oxidase, an enzyme that breaks down neurotransmitters such as serotonin, norepinephrine, and dopamine.

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