Natco Pharma, a Rs.290 crore pharma firm from Hyderabad, has filed ANDA for the generic version of oseltamivir phosphate capsules. Oseltamivir is used in the treatment of bird and swine-flu infections. Sold under the brand name Tamiflu, the product clocked global annual sales in the region of US$ 1 billion.


The company is the 'first applicant' to file an ANDA for the generic version of Tamflu and may be entitled to 180 days of generic market exclusivity after approval.


The company has tied up with the Luxemburg based Alvogen IPCO S.a.r.l., for marketing and sale of oseltamivir phosphate in the USA.