The pharmaceutical industry offered a new class of growth promoting agents called "beta-agonists," which are now part of the $22 billion global market in medicines, vaccines, feed additives and parasiticides for pets and livestock.
Ractopamine is a beta-agonist. Initially developed to treat asthma in humans, ractopamine was found to be extremely effective at changing the metabolism of an animal, so that the animal would quickly and cost-effectively add sought-after muscle. The FDA approved the use of beta-agonists in pigs in 1999, for cattle in 2003 and for turkeys in 2008.
"FDA remains confident in the safety and effective use of the drug when used in accordance with the approved labeling," says FDA spokeswoman Shelly L. Burgess. Porknetwork...
Is the US About to Become One Big Factory Farm for China? | Mother Jones
The small number of companies that dominate global meat production is about to get smaller. The Chinese corporation Shuanghui International, already the majority shareholder of China's largest meat producer, has just bought US giant Smithfield, the globe's largest hog producer and pork packer, in a $4.7 billion cash deal. (It still has to get past Smithfield's shareholders and the US Treasury Department's Committee on Foreign Investment, which reviews takeovers of US companies.)Big pork deal comes amid friction over livestock drug - NBC News.com
Analysis: Behind China's U.S. pork deal, fears over feed additives | Reuters
What Are Beta-Agonists?
What Are Beta-Agonists?
Beta-agonists are medications that mainly affect the muscles around the airways (bronchi and bronchioles). When the lungs are irritated, bands of muscle around the airways tighten, making the airways narrower. This often results in breathlessness. Beta-agonists work by telling the muscles of the airways to relax, widening the airways. This results in easier breathing.Beta-adrenergic agonist - Wikipedia, the free encyclopedia
Beta2-agonists for COPD: Uses & Side Effects
Side EffectsSide effects are much more likely to
occur when you take this medicine as a pill or injection than when you use the
inhaled form. Side effects can include:
The U.S. Food and Drug Administration (FDA) has reported
- Increased or irregular heartbeat
that arformoterol, formoterol, and salmeterol may make breathing more
difficult. If your wheezing gets worse after taking these medicines, call your
doctor right away.