6 Clenbuterol Side Effects That You’ll Want To Avoid

Clenbuterol Side Effects

Clenbuterol was initially been used on animals with breathing problems as it is a synthesised bronchodilator. However, its use as a weight loss supplement has garnered much momentum around the world. Even though there have been many notable side effects of this drug, both short-term, and long-term.

It helps lose mass by elevating the metabolism of the body. It affects the airways and the muscles in it, so they are more efficient and relaxed. As a result, the body receives more oxygen and blood flow. This increases the body’s ability to essential glycogens and burns fat.

The results of Clenbuterol have been very individual as some people even report losing lean muscles in the process. Someone who decides to take this drug should carefully weigh in all the potential side effects. The long-term side effects are found to be more hazardous than the short-term ones.

6 Clenbuterol Side Effects

  1. Increase In The Size of Heart Muscle Cells

There have not been enough medical experiments with Clenbuterol, but some studies on animals have suggested that this drug increases the size of the heart muscle cells via an inelastic substance called collagen. Not only does this increase the size but also affect the pumping efficiency of your heart.

Collagen may also affect the electric signals coming from the heart that help in the regular beating. This means that the heart may have an irregular beating. This is quite dangerous as it increases the risk of stroke.

  1. Worsen Pre-existing Heart Conditions

If you already have any pre-existing cardiac problems or blood pressure, Clenbuterol can make your problems worse. Even though the dose of this drug is usually minimal, even this small dosage can have long-lasting impacts such as left-sided cardiac atrophy. The left side of the heart will slowly waste away and stop working.

Since it increases the oxygen rates and blood flow for breaking down fats, you may also experience high blood pressure especially if you already suffer from this condition. This is one of the reasons why there is very little knowledge about how it works in humans.

  1. Fragile Bones

You might be losing fat with the intake of Clenbuterol but chances are you will also lose your bone strength in the process. It can affect the microarchitecture of your bones and make them fragile. This also affects the mechanical properties of the bones and exposes them to fracture.

In fact, increased bone fragility with larger muscle mass can increase the risk of bone fracture. And this has been learned mostly from Clenbuterol intake in animals but how it will work on developing bodies is still unknown. But one can assume that bones in a young person are at even higher risk.

  1. Anxiety or Nervousness

This is considered a short-term side-effect of this drug but it is important to know that Clenbuterol may take some time to get expelled from your body. It is a strong chemical to break down for your body and so long as it is inside your body, you may experience some side-effects including anxiety or nervousness.

Although anxiety or nervousness may not appear as a grave side-effect, it can be potentially disturbing for those who already suffer from anxiety. That is why it is better to check in advance with a medical practitioner if any of your pre-existing conditions will exacerbate.

  1. Weight Gain

Surprisingly enough, this drug can also result in weight gain in some individuals. It has been found that it works as a weight reducer for about four weeks after which it starts to increase the muscle weight. This is mainly because of the dramatic effect it has on a person’s metabolism.

Since Clenbuterol takes a long time to be broken down and expelled from the body, an overdose of the drug taken to lose weight can, in fact, have the opposite effect.

  1. Muscle Cramps

It is one of the short-term side effects and the result of the stimulant nature of this drug. Muscle cramps are obviously not pleasant at all and may occur as long as the stimulant is inside your body. This is why the dosage of this drug is kept very small.


Clenbuterol is very effective at weight loss and bodybuilders even use it in their post cycle therapy after discontinuing anabolic steroids. Overdosing can be very dangerous and may have many side-effects both short and long-term. It is best to know beforehand what potential side-effects it may have on your body and your particular conditions.

The best way to avoid any unwanted side effects is to use the product in moderation and buying only from the well-known brands that offer products made with only natural ingredients. The good news is, you can find many such brands online.

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