Tesofensine

Metabolic & Weight Loss
Phase 2
Investigational

Tesofensine is an oral weight-loss compound that blocks the brain from reabsorbing three appetite-related chemical messengers, noradrenaline, dopamine, and serotonin, so the feeling of fullness lasts longer and hunger drops. In a Phase 2 trial it produced about twice the weight loss of the diet drugs available at the time. It is investigational and not approved.

Last updated June 23, 2026
5 PubMed-Verified Studies
Popular
Research-Driven Dosage Reports
RouteOral
Dose0.25–1.0 mg (0.5 mg lead dose)
FrequencyOnce daily
Duration24 weeks (trial length)

Based on published research literature.

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Overview of Tesofensine

A once-daily pill that raises three of the brain chemicals that control appetite, so people feel full sooner and eat less.

Mechanisms (reported across clinical trials):
How it reduces appetite

Blocks the reuptake (reabsorption) of three signaling chemicals in the brain at once: noradrenaline, dopamine, and serotonin. Leaving more of them active strengthens the brain signals that say you are full.

In trials this showed up as a measurable rise in satiety (fullness) scores, which tracked with how much weight people lost.

How it differs from other weight-loss drugs

It works centrally in the brain on appetite chemistry, rather than through the gut hormone (GLP-1) pathway used by semaglutide and tirzepatide. That makes it an oral, non-injection option with a different mechanism.

What the weight effect looks like

In a 24-week Phase 2 trial, the middle dose produced about 9 percent body-weight loss, roughly double the diet drugs available at the time, and the top dose reached about 11 percent.

Trade-offs to know

Raising these brain chemicals can also lift heart rate and disturb sleep. A later formulation paired tesofensine with a low dose of a heart-rate-lowering medicine to manage that effect.

Read Full Tesofensine Dosage Guide

Research-backed dosing protocols, timing, and administration details

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