Entropin, Inc. is a pharmaceutical company primarily developing pain therapy treatments.

The original Complaint charges that Entropin and certain of its officers and directors violated Sections 10(b) and 20(a) of the Securities and Exchange Act of 1934 by making a series of materially false and misleading statements concerning the efficacy and timeline for clinical development of its developmental drug Esterom.

Note: The class action was filed on behalf of purchasers of stock and warrants in Entropin's March 15, 2000 public offering in which investors purchased units consisting of one share of common stock and one common stock purchase warrant.

On November 30, 2004, the Court entered an Order consolidating actions. The consolidated action is referred to as "In re Entropin, Inc. Securities Litigation," Master File No. CV 04-6180 RSWL (CWx). The Court also appointed lead Plaintiffs and lead Counsel. On December 3, 2004, the Plaintiffs filed a First Amended Complaint, and the Defendants responded by filing a motion to dismiss the First Amended Complaint. On February 8, 2005, the Court entered the Order that the motion to dismiss the first and second claims for relief to the first amended Complaint is denied, and the motion to dismiss the third claim for relief is granted, with leave to amend. On March 7, 2005, the Defendants filed a motion for summary judgment, which was later denied in the Order entered on May 4, 2005. The Plaintiffs filed a motion for class certification on September 16, 2005. The motion was granted in the Order entered on January 24, 2006. On March 16, 2006, the Defendants again filed a motion for summary judgment on loss causation, which was denied by the Order entered on April 26, 2006.

The parties entered into a Stipulation of Settlement on September 18, 2007. On November 8, 2007, the Court granted preliminary approval of the Settlement. The Court granted final approval of the Settlement on May 29, 2008. On July 22, the Court issued an Order approving Plaintiffs' Motion for Attorneys' Fees and Expenses and entered judgment dismissing the case with prejudice.