There is much debate about whether or not clenbuterol – a drug often used to improve athletic performance – contains dopamine, but recent studies suggest that the compound could be responsible for some of its effects. Clenbuterol is a sympathomimetic amine and has been shown to cause an increased heart rate, hypertension, and respiration problems. Some believe that this sympathetic stimulation results in an increase in energy levels and improved performance. Others contend that the increased heart rate and hypertension are simply by-products of the “pump” created by clenbuterol. However, recent research suggests that there may be a connection between dopamine and clenbuterol – specifically in regards to its sympathomimetic effects.