Clenbuterol is a prescription medicine used to treat breathing problems in people who have asthma or chronic obstructive pulmonary disease (COPD).

Clenbuterol is known medically as clenbuterol hydrochloride.

Clenbuterol works by stimulating your central nervous system. It is a stimulant that can affect certain centres in the brain. When these nerves are stimulated, your muscles relax, allowing you to breathe more easily and loudly, which helps with asthma and COPD symptoms.

Clenbuterol may also reduce how much stomach acid your body makes when you are taking it for weight loss. This could cause or increase the risk of stomach ulcers.

Clenbuterol can also be used for purposes not listed in this medication guide.

While all doses of clenbuterol will not produce the same effect, the lowest dose is recommended. Clenbuterol should not be used at all if you have heart disease or are pregnant. There are many side effects that can occur, including:

Clenbuterol has low potential for abuse and dependence. However, it has a long half-life, which allows for daily or frequent dosing. Thus, it may be abused by those who wish to remain lean and muscular.

Clenbuterol has been shown to enhance weight loss in obese patients with normal liver function when used in doses of 100 mcg/day or more.

Clenbuterol is most associated with increases in body weight and fat, BMI, and fat mass. Clenbuterol can induce a state of central obesity (muscle mass retention) in a dose-dependent manner. There can also be increases in total body fat when clenbuterol is used for extended periods. It has been reported that long-term clenbuterol use may lead to an additional increase in visceral fat. Other negative consequences of clenbuterol include:

Clenbuterol can only be legally used on animals, and in some countries, it is a prescription drug. The possible legal issues and the many side-effects have led many people to discontinue use or to not even start using this supplement. People who want quick results can lead to abuse because of the rapid weight loss experienced by some. The most common adverse reactions to clenbuterol were tachycardia, headache, dizziness, palpitations, nervousness and tremor, nausea, and insomnia.

The effects of clenbuterol vary from person to person because of its ubiquitous nature. Doses range from 20 to 80 mcg daily. As does the rise for the individual, the severity of side-effects increase, although most are tolerable at the lower end of the spectrum.

Clenbuterol has some benefits if used properly. However, it is better used by those who have a higher body fat percentage. People with low body fat levels require more cardio and less anabolic effect. Other supplements provide additional benefit when used with clenbuterol, such as thyroid hormone and human growth hormone (HGH). Clenbuterol can be used in bulking cycles that run up to 12 weeks, but it is recommended the users follow a proper PCT regimen first.