Australia's Mayne Pharma sues India's Sun Pharma for patent infringement over IMVEXXY vaginal insert in US court.

Australia's Mayne Pharma has filed a patent infringement lawsuit against Indian drugmaker Sun Pharma in a US court over the use of 20 Orange Book-listed patents related to IMVEXXY, a vaginal insert for menopause-related pain. Mayne Pharma claims Sun Pharma submitted an Abbreviated New Drug Application (ANDA) to the FDA to seek approval to market a generic version of IMVEXXY, prompting the lawsuit.