Clenbuterol 40 Mcg | Right Dosage, Side Effects, Results, And Price

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Written By Jonathan Deventer

Is Clenbuterol 40 Mcg Safe for Bodybuilders?

Before you take Clenbuterol 40 Mcg, you want to know what it might do in your body, both good and bad.

Remember that medical doses for the drug are often quite different than what bodybuilders and athletes use – and with different results.

Bodybuilders often incorporate Clenbuterol into their cycles or post-cycle therapy routines, but is it effective?

What is the recommended dose of Clenbuterol when used with a prescription and under a doctor’s guidance? Compare that to the dosage often taken by bodybuilders and athletes.

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What Exactly Clenbuterol Is?

Clenbuterol is classified as a therapeutic bronchodilator, also known as a beta-2 adrenergic – something that affects the sympathetic nervous system.


It’s defined as a sympathomimetic amine – something that mimics some autonomic functions in the body.

Autonomic functions include:

It’s known by a number of foreign as well as generic names but its chemical formula (C12 H18Cl2N2O) is the best way to ensure it’s the real thing.

Clenbuterol is marketed under a number of brand names around the world, including but not limited to:

  • Anbroxol + Clenbuterol
  • Arbixil
  • Clenbuxol
  • Spiropent
  • Ventoliber

It’s also found in a number of veterinary grade products including:

  • Airway
  • Airway TMPS
  • Clenovet
  • Equi Plus
  • Equipulmin

Clenbuterol is a bronchodilator with a long half-life. It’s not prescribed for human use in the United States but is a drug treatment choice in other countries around the world.

What would a bodybuilder gain from a bronchodilator? Because of its mechanism of action and properties, Clenbuterol is perceived to provide slight weight loss due to its ability to repartition body fat.

Because of increased oxygen and involvement (minimal) in metabolism, it may also help increase the development of lean muscle mass.

These abilities are minimal overall. A person would have to take extremely high doses (greater than 40 mcg) in order to see significant visible benefits.

In some ways, the components can enhance the production of energy, and therefore the building of muscle, but not nearly as much as that achieved through the use of an anabolic androgenic steroid.

The same applies to weight loss. Clenbuterol 40 Mcg is more effective on someone with an already lean body mass.

For example, the use of this medicine may help an athlete shed a few pounds prior to a competition, but it is relatively ineffective for anyone who is overweight or obese.


Clenbuterol Dosage

Dosage of Clenbuterol can have an impact on either benefits or potential side effects.

Medically recommended for the treatment of asthma, the average Clenbuterol dosage was up to 20 mcg a day.

Note – You may find references in regard to Clenbuterol usage defined in ug or Ugas well as mcg (micrograms). They’re the same thing – ug is merely the symbol for microgram.

The most common dosage used by bodybuilders averages 60 mcg to 120 mcg on a daily basis.

Women are recommended to use a slightly lower dosage range averaging Clenbuterol 40 Mcg to 120 mcg a day.

Suggestions are to cycle Clenbuterol 40 Mcg in a two-day on/two-day off cycle. However, you’ll find bodybuilding websites that recommend up to two weeks to three weeks on and the same time off.

For example, a three-week cycle for men is often combined with an anabolic androgenic steroid and other drugs designed to reduce the potential for side effects.

Some even recommend combining more than one type of bronchodilator into the post-cycle therapy routine.

Following is such a sample. High levels of such drugs, especially in combination, can contribute to a number of alarming side effects and adverse reactions.

ClenbuterolTestosteroneAdditional bronchodilator
Week 180 mcg daily50 mg daily16 mg daily
Week 280 mcg daily50 mg daily25 mg Proviron daily + 16 mg additional bronchodilator
Week 380 mcg daily50 mg daily25 mg Proviron Dealey + 16 mg additional bronchodilator
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Clenbuterol 40 Mcg Side Effects?

While Oral Clenbuterol 40 Mcg is considered a relatively low dose based on average use by bodybuilders and athletes, it can still contribute to side effects.

This is true of any drug that is put into the body when it’s not medically necessary. Watch for:

  • accelerated heart rate (tachycardia)
  • irregular heartbeat (arrhythmia)
  • increased respiration
  • trembling/jitteriness
  • nausea, with or without vomiting
  • diarrhea

The above symptoms can put a strain on numerous body systems including cardiovascular and respiratory function. The higher the dosage, the increased risk of experiencing such side effects.

Before using Clenbuterol, even in a relatively low Clenbuterol 40 Mcg dosage, be aware of the risk for unexpected side effects that more than outweigh its benefits for bodybuilding, muscle mass gains, or weight loss.



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  2. Cancelliero KM. The effect of a low dose of clenbuterol on rat soleus muscle submitted to joint immobilization. Braz J Med Biol Res. 2008 Dec.
  3. Umeki D. Protective Effects of Clenbuterol against Dexamethasone-Induced Masseter Muscle Atrophy and Myosin Heavy Chain Transition. PLoS One. 2015 Jun 8.
  4. Kamalakkannan G. Clenbuterol increases lean muscle mass but not endurance in patients with chronic heart failure. J Heart Lung Transplant. 2008 Apr.
  5. Zhao Z. Clenbuterol Distribution and Residues in Goat Tissues After the Repeated Administration of a Growth-Promoting Dose. J Anal Toxicol. 2015 Jul-Aug.
  6. Du W. Combined solid-phase microextraction and high-performance liquid chromatography with ultroviolet detection for simultaneous analysis of clenbuterol. Biomed Chromatogr. 2013 Dec.

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