( MENAFN - PR Newswire) SOUTH SAN FRANCISCO, Calif., March 27, 2025 /PRNewswire/ -- Rigel Pharmaceuticals, Inc. (Nasdaq: RIGL ) today announced that it has entered into a settlement agreement with Annora Pharma Private Ltd., Hetero Labs Ltd., and Hetero USA, Inc. (collectively "Annora") resolving patent litigation related to Rigel's product TAVALISSE ® (fostamatinib disodium hexahydrate). The litigation resulted from submission by Annora of an Abbreviated New Drug Application to the U.S. Food and Drug Administration (FDA) seeking approval to market a generic version of TAVALISSE in the United States. Under the terms of the settlement agreement, Annora will have a license to sell its generic product in Q2 2032 or earlier under certain circumstances.