Clenbuterol is a bronchodilator used for treatment of asthma. Clenbuterol belongs to a group of drugs known as sympathomimetics. Clenbuterol also exhibits an extremely long half-life, approximately 34 hours long. This makes steady blood levels easy to achieve, requiring only a single or twice daily dosage.
Clenbuterol is additionally known to be thermogenic with beta-2 agonists like clenbuterol shown to directly stimulate fat cells and accelerate the breakdown of triglycerides to form free fatty acids. In this area makes clenbuterol a very attractive precontest drug, promoting the loss of body fat while imparting strength and muscle mass increases. If looking for strength gains, clenbuterol appears to be effective for a much shorter period, around 3-4 weeks. This may be due to an absence of real anabolic effect, with the strength gain seen with clenbuterol. Reason is a stimulant property of the drug.