Cornerstone will be Lupin's promotion partner in the US for its Suprax (cefixime) anti-infective.
"Cornerstone's sales force will co-promote Suprax with a focus on primary care physicians, who were not covered by us, with immediate effect," LPI managing director and president Vinita Gupta said on Thursday.
This partnership represents a significant expansion in the scope of physician coverage for Suprax in the $1.2 billion oral suspension anti-infective market, she added.