Facts Sun Pharma Laboratories has manufactured and sold a Pantoprazole-based anti-acidity drug under the mark “PANTOCID” since 1999, with related variants like PANTOCID-DSR and PANTOCID-L. Its registration application was filed in February 1998 and granted in 2012, after surviving an opposition by Atlanta Pharma A.G. (Takeda’s successor), whose own earlier “proposed to be used” application