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Clenbuterol Review - Does This Decongestant Really Work? Are side effects and off-label use deal breakers?

  • 10 User Comments
  • Rating: 3.8. From 46 votes.
By Summer Banks Dec 01, 2016

A diet product’s worth depends on whether it actually helps people lose weight. Let’s find out if Clenbuterol really works. We really took our time to create a detailed review that focuses specifically on the side effects, ingredients, scientific studies, and customer-service quality. Then we analyzed numerous user comments from all over the internet. Finally, we summarized all of the data we gathered to give you the facts.

Clenbuterol Readers: Click here to find out why we're giving away samples of our product, Pronabolin.

What is Clenbuterol?

The first thing you need to know is that Clenbuterol is a prescription decongestant and bronchodilator used to make breathing easier for people with conditions such asthma and chronic bronchitis. It has a chemical structure that is similar to epinephrine and also has some pharmacological similarities.

Clenbuterol is manufactured by numerous companies for a variety of purposes. In addition to being produced for the treatment of respiratory issues it has also given to livestock, but read on…

Side Effects– “A Problem?”

The first issue we found with Clenbuterol is the pronounced possibility of side effects. These include tachycardia, nervousness, hyperthyroidism, and high blood pressure. According to our Research Editor, “Not all people will experience these types of issues. The cost risk analysis is positive for those using it as a breathing treatment as prescribed. The risk appears to increase when used in other ways.”

This reviewer said, “I was anxious the whole time I was taking this and my heartbeat was all over the place.”

Another added, “My thyroid levels were way off.”

Not everyone experienced significant side effects.

A pleased shopper acknowledged, “I had a slight headache the first day I took this but that went away and then nothing but weight loss.”

And a satisfied client noted, “I got to my goal weight. Great product.”

Off Label Use– “Why?”

This product was not designed and is not marketed by the manufacturer as being a weight-loss supplement. People are taking something that has absolutely no research backing its use for this purpose.

One man claimed, “I found this in my daughter’s room and she said it was so she could lose some weight.”

While another said, “No one explained what it was really for. I didn’t understand.”

Others were less concerned about using it for unintended purposes.

A dieter pointed out, “Lots of medications are used primarily for off label reasons. This is no different and it works like a charm.”

Which was echoed by another woman who quipped, “This is literally the best weight-loss method ever.”

According to our research, off label use and significant side effects are seen as warning signs for consumers. If Clenbuterol comes with the risks claimed on the product label, the dieter should consider that beforehand.

The Science – “Not For Weight-Loss”

At DietSpotlight, we are always excited when we see real science behind a featured product. Clenbuterol does in fact have a substantial amount of testing for its intended use. Unfortunately, there is nothing but anecdotal evidence to support any weight-loss claims.

The Bottom Line – Does Clenbuterol Work?

Should I race out for a bottle of Clenbuterol? It will probably be difficult to obtain a bottle specifically to drop some weight. Even though there are a number of high profile dieters who claim it works and you may be able to get a bottle, it could come with a strong risk of side effects. This is why we have reservations about giving it the green light.

If you’re ready to lose weight, we suggest choosing something that was designed and tested specifically for that purpose. It is important that the ingredients included in the formulation are backed by scientific research and that the company that manufactures it fully stands behind their product.

Among the best products we’ve seen in 2016 is one called Leptigen. It is made of a combination of four key ingredients, which have been documented in clinical research to help intensify fat loss and raise metabolism. Our research didn’t locate any negative customer reviews online. However, there were many people happily sharing glowing testimonials about their excellent results.

The makers of Leptigen are so sure of their product they’re offering a Special Trial Offer, which is quite reassuring.

Previous Clenbuterol Review (Updated June 12, 2013):

What You Should Know

Clenbuterol, also called Clen, is used primarily by bodybuilders. The product has been around for 30 years and is used in some countries to treat asthma. The manufacturer claims that it works by raising the core temperature of the body to burn more energy. Clenbuterol is most commonly taken in pill form, but may also be taken as a liquid, nasal spray or injectable.

List Of Ingredients

We found no list of ingredients available on the website.

Product Features

The website says that Clenbuterol helps you lose weight and add definition quickly. It states on several pages that Clenbuterol is not a steroid. The scientific report indicates that it behaves like a steroid, and that has the effects of increasing cardiac output, raising blood pressure, increasing bronchial muscles to provide more oxygen to muscles, reverses the effects of insulin to make more glucose available and increases thermogensis to raise the body temperature.


  • The website is packed with information, although it is not always easy to locate.
  • The product has been on the market for 30 years.


  • The website advises that Clenbuterol only be used 3 weeks in a row because it downgrades the body's beta 2 receptors.
  • The very long list of side effects for this product includes nausea and vomiting, muscle cramps, nervousness, tremors, dizziness, drowsiness, chest pains, dry mouth, light-headedness, flushing, insomnia, headache, heavy sweating, heartburn, and a rise in blood pressure.
  • The website states that the effects are similar to ephedra, a substance banned after causing many heart attacks, and to steroids.
  • Clenbuterol is banned for use by professional athletes by the World Anti Doping Agency and the IAAF
  • Clenbuterol was developed to treat asthma in horses.
  • Clenbuterol is not approved by the FDA for human, but it is not illegal. It is approved for use in horses.
  • Clenbuterol seems to be pricey at $100 a bottle, but it's difficult to tell how long a bottle will last, since dosages are calculated by mcg and depend on gender and weight.


We can't recommend this product. The scientific process sounds very close to other products that have proven to be extremely dangerous. There is a long list of side effects and contraindications. Pregnant women, people with heart problems or high blood pressure, diabetics, and people taking beta-blockers should not take Clenbuterol. Instead of taking potentially dangerous drugs, find an appetite suppressant and a reliable fat burner that does not work by causing alarming reactions in your body, follow a healthy diet and get some exercise. You'll be healthier and thinner in no time without increasing your risk of heart attack or stroke.
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About the Author:

Summer Banks, a content strategist at Leptigen, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.8. From 46 votes.
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10 Comments on "Clenbuterol Review"


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Hi, if someone used it before please share with us

it’s excellent although it gives pain to my elbows at moments, besides that excellent! Would recommend to anyone

Wht if a pregant women takes clenez 100

Who can supply me with cheap anabolic steroids in sandton bbm me or email me 27202B91

Wanted to ask if you ever found gear in sandton? Thanks

Good Day,

Who can supply me with clen in Johannesburg Sandton. My number is 083 6897902

my clen is working great for me its help me shed so much weight i looked fabulous at my wedding and even my wife is trying it now i got my clen at clenbuterolsupplies.co.uk i should excersize more but im still losing weight so im happy

Mike, how has CLEN been for you? Can you give any issues that you experienced.. I am thinking of using… Thanks .. Alex

Am using Astralean Clen 40mg for a long time….it does give me dizzy feel sometimes but has helped me reduce almost 58 kgs in a year.

is there any ephedren in clenbuterol