Clenbuterol is used worldwide for the treatment of allergic respiratory disease in horses, as a bronchodilator. It can be used both orally and intravenously. It is also a non-steroidal anabolic and metabolism accelerator, through a mechanism not well understood. Its ability to increase the muscle-to-fat body ratio makes its illegal use in livestock popular to obtain leaner meats. It increases the rate at which fats are metabolized, simultaneously increasing the body's BMR. It is commonly used for smooth muscle relaxant properties. This means that it is a bronchodilator and tocolytic. It is usually used in dosages anywhere from 20-60 micrograms a day when prescribed. A dose of about 160mcg should never be exceeded in a day. 100 x 40mcg tablets