Clenbuterol Use in Fitness and Bodybuilding

What is Clenbuterol?

Clenbuterol (commonly known as “Clen”) is a potent, long-lasting bronchodilator that is prescribed for human use outside of the U.S. It is abused generally by bodybuilders and athletes for its ability to increase lean muscle mass and reduce body fat (i.e., repartitioning effects). However, clenbuterol is also associated with significant adverse cardiovascular and neurological effects.

Is Clenbuterol Legal?

In the United States, clenbuterol is banned for human use. It is only approved for use in horses. In 1998, the Federal Food and Drug Administration (FDA) approved the clenbuterol-based Ventipulmin Syrup, as a prescription-only drug for the treatment of airway obstruction in horses. This product is not intended for human use or for use in food-producing animals. Clenbuterol is also listed by the World Anti-Doping Agency and the International Olympic Committee as a performance enhancing drug. So, unless you’re a horse with bad lungs, this drug is illegal. In fact, any horse that received the drug cannot be slaughtered for food.

Outside the U.S., clenbuterol is available by prescription for the treatment of bronchial asthma in humans. It is available in tablets (0.01 or 0.02 mg per tablet) and liquid preparations. The recommended dosage is 0.02-0.03 mg twice daily.

How does Clenbuterol work?

Clenbuterol is a beta2-adrenergic agonist, which stimulates the beta2-adrenergic receptors on bronchial smooth muscle produces bronchodilation or opens up the airways. Llike other beta adrenergic agonists, clenbuterol can produce adverse cardiovascular and neurological effects, such as heart palpitations, muscle tremors, and nervousness. Activation of beta-adrenergic receptors also accounts for clenbuterol’s ability to increase lean muscle mass and reduce body fat, however, how  it reduces it does this is not yet clearly defined.

Why is Clenbuterol abused?

Clenbuterol is abused for its ability to change the body’s composition by reducing body fat and increasing skeletal muscle mass. It is typically abused by athletes and bodybuilders at dose of 60-120 µg per day (two to three times the recommended daily dose). It is often used in combination with other performance enhancing drugs, such as anabolic steroids, “pro hormones”, and growth hormone.

Clenbuterol is also illicitly given to livestock for ability to increase lean muscle mass and reduce body fat. This has resulted in several outbreaks of acute illness in Spain, France, Italy, China, and Portugal 0.5-3 hours after individuals ingested liver and meat containing clenbuterol residues. The symptoms, which included increased heart rate, nervousness, headache, muscular tremor, dizziness, nausea, vomiting, fever, and chills, typically resolved within 2 to 6 days. Because of this, the U.S. and some European countries actively monitor urine and tissue samples from livestock for the presence of clenbuterol.

There have also been reports of clenbuterol-tainted heroin and cocaine. Although no deaths were attributed to the clenbuterol exposures, the individuals were hospitalized for up to several days due to clenbuterol intoxication.


Who are the major abusers of Clenbuterol?

Clenbuterol is typically abused by athletes, including fitness athletes and bodybuilders. It is believed to be more popular among female athletes since its effects are not associated with the typical androgenic side effects such as growing facial hair, deepening of the voice, and thickening of the skin. Professional athletes in several different sports have tested positive for clenbuterol. lt is also marketed and abused for weight-loss purposes.

Where do people get Clenbuterol?

Clenbuterol is obtained by illegal importation from other countries where it is approved for human use. It is readily available on the Internet as tablets, syrup, and an injectable formulation. The Drug Enforcement Agency (DEA) and other forensic laboratories have reported numerous clenbuterol items since 2006 till now.  However because clenbuterol is to controlled in the United States, it is highly possible that the number of clenbuterol-containing drugs may be much higher than reported.

So my follow fitness enthusiasts, if you’re looking for something to build perfectly sculpted muscles, remember that the side effects associated with clenbuterol use far exceed the temporary benefits you gain from it. Try to avoid products that promise quick fixes if your overall health and wellbeing is more important to you than looking good; because you may end up looking real good in a box instead of in your clothes.


About The Author

About Dr. Kofi KOFLEX SPORTS NUTRITION features the unique and all-natural health and sports nutraceutical formulations of Dr. Kofi Abrampah (Dr. Kofi). His unique formulations are backed by years of extensive research and clinical studies. Education: Dr. Kofi received his Doctor of Pharmacy (Pharm.D) degree from University of Rhode Island and his Nuclear Certification from Purdue University. He was a Research Fellow at Cornell University Medical School where he was involved in cancer research at the prestigious Memorial Sloan-Kettering Cancer Center in New York City. There he co-authored a published study, “Determining the Specific Epitope of the Globo H Antigen using the MBR1 Monoclonal Antibody.” Licenses: Dr. Kofi is a practicing Nuclear/Clinical Pharmacist actively licensed in eleven states; including California, Florida, Texas, Arizona, Washington, Illinois, Rhode Island, Maryland, Massachusetts, Nevada, and Oregon Experience: As a Nuclear Pharmacist, he compounds or prepares radiopharmaceutical (radioactive drugs). These drugs are used for diagnosis and treatment of various medical conditions; ranging from heart, liver, brain, gastrointestinal, kidney, thyroid disease and some cancers. In his capacity as a Clinical Pharmacist, Dr. Kofi provides drug information and pharmaceutical care to patients in various clinical settings. Publications: Dr. Kofi co-authored a published study on Globo H Antigen in the The Journal of Organic Chemistry 1995, 60, 7716-7717. Read Paper Dr. Kofi has also worked as a Research Associate at Miriam Hospital in Rhode Island, where he co-authored several published manuscripts on the Effect of Glycyrrhizic Acid Like Factors (GALFs) on 11ßHSD in human kidney and liver microsomes, and structural elucidation of GALFs. Dr. Kofi’s published research on GALFs in the Journal of American Society of Hypertention 2 (4) (2008) 286-293. Read Paper Bodybuilding: Dr. Kofi is not just passionate about developing innovative, all-natural and effective products, he actually designs them for his own use. His formulations have helped him “Sculpt his Masterpiece”. He has won numerous natural bodybuilding competitions. Here are a few of Dr. Kofi’s contest placements:Dr. Kofi 2004 MuscleMania World — 4th place in the Pro division 2002 MuscleMania World — 2nd place in the Pro division 2002 Atlantic MuscleMania — 1st place in the welterweight division 2001 Atlantic MuscleMania — Overall Champion 2001 ANBC Rhode Island — Overall Champion 2000 ANBC New England — Overall Champion 2000 NABF Maine — Overall Champion Dr. Kofi received his professional status within just two years of competing as a world class natural bodybuilder; a feat that takes some athletes many years to accomplish. What Dr. Kofi has accomplished within the short amount of time is a testament that his formulations really work!!! Try them and see for yourself!!! If you have any questions please do not hesitate to contact Dr. Kofi @

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