---
title: "How phentermine works: appetite and brain signals"
description: "How phentermine works: it reduces appetite through brain norepinephrine signaling. It is for short term use with diet and activity."
canonical: "https://www.vitalsvault.com/treatment-learn/how-phentermine-works"
last-updated: 2026-08-22
---

# How phentermine works: appetite and brain signals

> How phentermine works: it reduces appetite through brain norepinephrine signaling. It is for short term use with diet and activity.

---

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