In the first week of November, the Food and Drug Administration issued recall of Vetsulin Insulin, a porcine based insulin produced by Intervet/Schering Plough. The recall notice can be viewed here: http://www.fda.gov/AnimalVeterinary/news
The recall was initiated due to an abnormal amount of crystalline zinc, or the longer acting, component of the insulin was found in the product. This improper formulation of the insulin can cause an unreliable response to the medication in the animal. Per Intervet/Schering Plough, while zinc is a normal part of the suspension, the inability to regulate an animal to the proper dose of insulin can cause unreliable glucose responses in patients.
The product has not been discontinued, but only limited supplies are available to the veterinary community. This means that if you have an animal regulated to Vetsulin insulin, if you have not already, you should open a dialogue with your veterinarian to be sure that you have a plan developed for your pet. There is a distinct possibility that you may need to start your animal on another type of insulin.
If you have a diabetic animal, you know that it can be quite hard to find the proper insulin dosing schedule to keep your pet healthy and happy. Switching an animal from one form of insulin to another is a task that must be undertaken carefully and with the support of a trusted veterinary professional. Thankfully there are many talented individuals as well as many different forms of insulin to use in the animal community.
For more information on Diabetes in animals, please: http://www.aspca.org/pet-care/cat-care/diabetes.html or any other reliable source of information on the internet.