 On 18 June 2007 Pfizer announced it will move the Sandwich Animal Health Research (VMRD) division to Kalamazoo, Michigan.Several important drugs including Viagra, Pfizer's treatment for erectile dysfunction and Maraviroc, a drug used for treatment of HIV, were developed here.On 1 February 2011 Pfizer announced that the entire research and development facility at Sandwich would be closed within 18–24 months, with a loss of 2,400 jobs, though it later announced up to 650 jobs would stay.