![]() ![]() During this time, cows are injected with Posilac™ subcutaneously (under the skin) every 14 days. Posilac™ is approved for over-the-counter use in dairy cows starting at around 2 months after the cow has a calf until the end of the lactation period. ![]() The FDA publishes public documents (Freedom of Information Summaries) on its website that summarize the information that FDA used to determine that the drug is safe for the treated animals, the animal products (edible tissues such as meat and milk) are safe for humans to eat, and that the product is effective.įDA approved a bST product in 1993 with the brand name “Posilac™” (sometribove zinc suspension) after determining that its use would be safe and effective. The labeling for animal drug products provides all instructions for safe and effective use and is approved by FDA. The drug also must be effective, meaning that it works as intended. The FDA approves an animal drug for food-producing animals only after information and/or studies have shown that the food (in this case, milk and meat) from the treated animals is safe for people to eat, and that the drug does not harm treated animals, or the environment. This process is also advantageous for producing a more consistent and purified source of bST. ![]() The bST derived by this process is typically called “recombinant” bST or “rbST”. However, it wasn’t until the 1980s that it became technically possible and economically feasible to produce large commercial quantities of bST by a process using biotechnology. English scientists attempted to increase milk production in cows during World War II with pituitary-derived bST to alleviate food shortages. Somatotropin is a protein hormone produced in the pituitary gland of animals, including humans, and is essential for normal growth, development, and health maintenance.Įarly research in the 1930s and 1940s in Russia and England found that milk production in cows could be increased by injecting cattle pituitary extracts, specifically bST. This drug is based on the somatotropin naturally produced in cattle. Bovine somatotropin (bST), also known as bovine growth hormone, is an animal drug approved by FDA to increase milk production in dairy cows. ![]()
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