Silbersher v. Valeant Pharmaceuticals International, Inc

District Court, N.D. California·Decided May 11, 2020·No. 3:18-cv-01496·Unknown

Opinion

ZACHARY SILBERSHER, et al., Case No. 3:18-cv-01496-JD

Plaintiffs, ORDER RE MOTION TO DISMISS v. Re: Dkt. No. 36 INTERNATIONAL, INC., et al., Defendants.

This is a qui tam action under the federal False Claims Act (“FCA”), 31 U.S.C. §§ 3729- 3733, and the counterpart statutes of twenty-eight states, and the District of Columbia. In a “corrected first amended complaint,” Dkt. No. 10 (“CFAC”), plaintiff-relator Zachary Silbersher alleges that defendants fraudulently obtained U.S. Patent No. 8,865,688 (the “’688 patent”), which allowed them to raise the price for the prescription drug Apriso by wrongfully excluding generic competitors. The false claim is said to be the inflated prices that Medicare, Medicaid and other government agencies paid for Apriso prescriptions. Silbersher is an attorney, and the CFAC is based on a patent litigation case he handled that invalidated the ’688 patent. He was never an employee or an insider at any of the defendant companies. The United States has declined to intervene, Dkt. No. 8, and no state or the District of Columbia has sought to join as a plaintiff. The Valeant and Salix defendants move to dismiss the CFAC under Federal Rule of Civil Procedure 12(b)(6) on three grounds: (1) it does not allege an actionable false claim; (2) the claim is foreclosed by the FCA’s public disclosure bar; and (3) the claim sounds in fraud and has not been alleged with the degree of particularity required by Rule 9(b). Dkt. No. 36. Valeant and Defendant Dr. Falk Pharma GmbH, a German corporation headquartered in Breisgau, Germany, joins the motions and the arguments Valeant and Salix make against the CFAC and to stay discovery. Dkt. Nos. 42, 52. Falk also filed a separate motion under Rule 12(b)(2) that challenged personal jurisdiction in this District, which the Court denied. Dkt. Nos. 43, 108. The Court heard oral argument on the Rule 12(b)(6) motion. Dkt. No. 94. The case was stayed in all aspects pending this order. Id. The federal FCA claim is dismissed under the public disclosure bar, and the Court declines to exercise jurisdiction over the state law claims. The motion to stay discovery is terminated as moot. As alleged in the CFAC, defendants make and sell Apriso, a drug used to treat inflammatory bowel conditions like ulcerative colitis. Dkt. No. 10 ¶ 2. The active ingredient in Apriso is mesalamine, which is said to have been used “for decades” for ulcerative colitis and “has long been off-patent.” Id. To ensure that mesalamine reaches the bowel and is not metabolized in the stomach, it can be encased in a protective enteric coating that dissolves only in the colon. Id. ¶¶ 3-4. Apriso is a coated and extended release formulation of mesalamine that was approved for sale in the United States in 2008. Id. ¶¶ 2, 4. The patent situation for mesalamine changed in October 2014, when the United States Patent and Trademark Office (“USPTO”) issued the ’688 patent, which has been assigned to Falk at all times relevant to this case. Id. ¶¶ 44, 80-82. The ’688 patent relates to the remission of ulcerative colitis. Claim 1 recites a “method of maintaining the remission of ulcerative colitis in a subject comprising administering to the subject a granulated mesalamine formulation . . . once per day in the morning, without food.” ’688 patent, col. 34, ll. 11-15. The patent’s other independent claim, claim 16, is identical to claim 1, but adds the limitation of “advising the subject that granulated mesalamine should not be taken with antacids.” Id. at col. 35, ll. 5-6. After the ’688 patent was issued, generics manufacturers sued to invalidate it. Dkt. No. 10 ¶¶ 15-16. The key proceedings took place before the Patent Trial and Appeal Board (“PTAB”). The lead plaintiff was GeneriCo, LLC, which filed a petition in December 2015 for inter partes 00297, 2017 WL 2211672, at *1 (P.T.A.B. May 19, 2017). IPR was instituted to determine whether claims 1 and 16 were unpatentable as obvious over prior art that was available before the ’688 patent application was filed. Id. at *3; see also 35 U.S.C. § 103(a) (2006). In May 2017, the PTAB concluded that claims 1 and 16 were unpatentable as obvious.1 The PTAB construed the ’688 patent to address problems with prior mesalamine delivery systems such as “sensitivity to conditions that increase gastric pH and cause premature release of mesalamine (e.g., ingestion of a meal).” GeneriCo, 2017 WL 2211672, at *2 (citation omitted). It determined that the method in the ’688 patent was an obvious solution over several publicly available prior art references. These included two press releases by Salix, one of which specifically announced the “successful completion” of clinical trials of a granulated mesalamine formulation with an enteric coating, id. at *8, and three academic papers: (1) the “Davis -- 1985” study by S. S. Davis, The Design and Evaluation of Controlled Release Systems for the Gastrointestinal Tract, 2 J. Controlled Release 27-38 (1985); (2) the “Marakhouski” study by Y. Marakhouski, et al., A Double-Blind Dose-Escalating Trial Comparing Novel Mesalazine Pellets with Mesalazine Tablets in Active Ulcerative Colitis, 21 Alimentary Pharmacology Therapeutics 133-40 (2005); and (3) the “Brunner” study by M. Brunner, et al., Gastrointenstinal Transit and Release of 5-Aminosalicylic Acid from 153Sm-Labelled Mesalazine Pellets vs. Tablets in Male Healthy Volunteers, 17 Alimentary Pharmacology Therapeutics 1163-69 (2003), id. at *3, *8-*9. Davis --1985 discussed the effect of food on stomach pH and gastric emptying in connection with orally administered medications, as well as the positioned release of drugs in the colon, and used the treatment of ulcerative colitis as an example. Id. at *8. The PTAB made a detailed analysis of this prior art in the course of invalidating the ’688 patent. See id. at *8-*19. Among other findings, it noted that the Salix press releases disclosed “the elements recited in the preamble [to the ’688 patent] and most of paragraph [a] of claim 1” for the administration of a granulated mesalamine formulation. Id. at *9. It determined that the “without food” limitation “is suggested by either Marakhouski or Brunner in view of Davis -- 1985,” and that these references would have indicated that the method described in the Salix press releases “could be advantageously and successfully practiced by administering granulated mesalamine without food.” Id. The PTAB also found that a person of ordinary skill in the art would have been aware of these teachings and motivated to combine them to obtain the advantages of a granulated mesalamine formulation administered independent of food. Id. at *14-*15. Consequently, it concluded that GeneriCo had established that claims 1 and 16 of the ’688 patent were unpatentable as obvious. Id. at *24. News sources immediately published reports of GeneriCo’s victory and its implications for Apriso. Law360, for example, a national legal publication with wide readership, ran a story on May 19, 2017, announcing that GeneriCo “had shown the challenged patent claims would have been obvious.” Matthew Bultman, Part of Apriso Patent Nixed in IPR with Hedge Fund Ties, Law360 (May 19, 2017, 4:58 p.m. EDT), https://www.law360.com/articles/926213/part-of-apriso- patent-nixed-in-ipr-with-hedge-fund-ties. The article expressly linked the PTAB’s finding of obviousness to Apriso, reporting that the decision “invalidated part of a patent covering Apriso, an ulcerative colitis treatment.” Id.2 Falk appealed the PTAB decision to the Federal Circuit. The appeal was pending when the CFAC was filed, Dkt. No. 10 ¶ 16, but in June 2019, the Federal Circuit affirmed the decision in all

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