Clenbuterol is a sympathetic amine that was manufactured for use in people with chest problems to promote decongestion and relief of symptoms. It is however used by body builders, athletics and people looking to lose weight as an off label cutting agent. Despite the many advocates for its use, training with Clenbuterol dangers has been documented.

Clenbuterol is available in a wide range of formulations including pills, gels, liquid drops, syrups, powders and aerosol sprays. Tablets are usually in the form of 10 t0 20 micrograms. 20 micrograms are more widely used. Advanced users of steroids are able to take over 80 micrograms daily but care is to be taken to avoid the toxic dose of over 200 micrograms daily.

Some of the short term dangers of training with Clenbuterol include those caused due to increased contraction of the skeletal and cardiac muscles. The symptoms include muscle cramps, an elevated heart rate, palpitations, sweating, vomiting and difficulty in breathing, hand tremors, insomnia, dry mouth and headaches.

The long term dangers of using Clenbuterol include the feared danger of cardiomyopathy. Due to the sympathetic action on the heart, there is increased contractility which leads to cardiac muscle hypertrophy. The effect is usually a highly muscular heart that is big and does not allow adequate dilatation so as to enable enough blood volume into its chambers. With prolonged use, there is development of regions of the heart that do not get oxygen supply and die, a process called myocardial infarction. There is increased risk of heart attacks, heart failure and sudden cardiac death.

Another rare danger of taking Clenbuterol is the risk of weight gain with prolonged use. For weight loss, shorter duration of use is required with a clear strategy to maintain the weight loss once the stop of the amine.