---
title: "Clenbuterol"
description: "β2-agonist bronchodilator used as a fat burner. Receptor down-regulation forces 2 weeks on / 2 weeks off cycles (or Ketotifen for continuous cycles). Tremors and tachycardia very common at the start of a cycle."
lang: en
dateModified: 2026-05-25
canonical: https://anaprotokol.com/en/molecule/clenbuterol
---

# Clenbuterol

β2-agonist bronchodilator used as a fat burner. Receptor down-regulation forces 2 weeks on / 2 weeks off cycles (or Ketotifen for continuous cycles). Tremors and tachycardia very common at the start of a cycle.

**Catégorie** : Brûleur de graisse
**Voie d'administration** : Oral
**Demi-vie** : 36–48 heures
**Détection** : 4 jours
**Aromatisation** : Non
**Progestine** : Non
**Hépatotoxique** : Non
**PCT requise** : Non

**Autres noms** : Clen

## Effets
- β2-adrenergic lipolysis
- Increased body temperature
- Anti-catabolic muscle preservation
- Mild VO2 max improvement

## Effets secondaires
- Tremors (hands)
- Tachycardia
- Muscle cramps
- Insomnia
- Anxiety
- Hypertension
- Long-term cardiotoxicity

## Suppléments de soutien
- Taurine (cramps)
- Potassium
- Magnesium
- Beta-blockers if HR too high

## Synergies
- Ketotifen (for continuous cycles without down-regulation)
- T3
- Steroids (cutting)

## À éviter
- Cardiomyopathies
- Uncontrolled hypertension
- Doses > 140 mcg/day
- Continuous cycles > 6 weeks without a break

## Dosage masculin
- Débutant : 20–40 mcg/j
- Intermédiaire : 80–100 mcg/j
- Avancé : 120–140 mcg/j (max absolu)

## Dosage féminin
20-80 mcg/day (more sensitive)

**Fréquence** : 1× / day (morning) · Protocols: 2 weeks on / 2 weeks off