Christopher J. Stockwell v. Sumitomo Pharma America, Inc.

District Court, W.D. Washington·Decided March 20, 2026·No. 2:25-cv-00492·Unknown

Opinion

HONORABLE RICHARD A. JONES

UNITED STATES DISTRICT COURT AT SEATTLE CHRISTOPHER J. STOCKWELL, Case No. 2:25-cv-00492-RAJ Plaintiff, ORDER ON DEFENDANT’S v. SUMITOMO PHARMA

Defendant.

I. INTRODUCTION THIS MATTER comes before the Court on the Motion to Dismiss (the “Motion,” Dkt. # 16) filed by Sumitomo Pharma America, Inc. (“SMPA,” “Sumitomo” or the “Defendant”). Plaintiff Christopher J. Stockwell filed a response in opposition to the Motion (the “Response,” Dkt. # 19). SMPA filed a reply in support of the Motion (the “Reply,” Dkt. # 20). For the reasons set forth below,1 the Court GRANTS the Motion and DISMISSES Counts I and III of the Complaint with prejudice and Counts II, IV and V without prejudice.2 II. BACKGROUND Latuda (lurasidone HCI) is an antipsychotic medication manufactured by SMPA and used to treat schizophrenia and bipolar depression. Dkt. # 1-2 ¶ 23; Dkt. # 16 at 7. The drug first received approval from the Food and Drug Administration (FDA) in 2010. Dkt. # 16 at 7. Akathisia, an intense feeling of inner restlessness and an uncontrollable urge to move, is listed as a common adverse effect of the medication. Dkt. # 1-2 ¶ 23; Dkt. # 16 at 7. The prescription information for Latuda also warns patients of the risks of potential suicidal ideation associated with upward or downward dosage adjustments. Dkt. # 16 at 7; see also Dkt. # 1-2 ¶ 23.

1 While the parties request oral argument, the court concludes that oral argument is not necessary to decide the Motion. See Local Rules W.D. Wash. LCR 7(b)(4). 2 SMPA also filed a Declaration of John Devlin in support of the Motion (the “Devlin Declaration,” Dkt. # 17), and a Request for Judicial Notice with respect to the documents attached to the Devlin Declaration as Exhibits 1 through 12 (Dkt. # 18). Exhibits 1 through 12 are all publicly accessible FDA documents relating to the medication underpinning Plaintiff’s complaint: namely, FDA approval letters, approved drug labels, and drug information on the FDA’s website. See # 17-1. Judicial notice of FDA approval letters, drug labels, and other information publicly available on the FDA website is commonplace. See, e.g., Morris v. Sun Pharma Glob., No. CV2010441PAJPRX, 2021 WL 687247, at *3 (C.D. Cal. Feb. 19, 2021) (taking judicial notice of FDA prescription drug approval letter as a “public document available on the FDA website . . . capable of accurate and ready determination by resort to sources whose accuracy cannot reasonably be questioned.”); In re Epogen & Aranesp Off-Label Marketing & Sales Practices Litigation, 590 F. Supp. 2d 1282, 1286 (C.D. Cal. 2008) (taking judicial notice of FDA-approved drug labels available on agency website); Eidson v. Medtronic, Inc., 981 F. Supp. 2d 868, 878–79 (N.D. Cal. 2013) (taking judicial notice of documents from FDA’s public website). Accordingly, the Court takes judicial notice of Exhibits 1 through 12 to the Devlin Declaration. Plaintiff alleges that, on September 3, 2022, following a recent increase in his Latuda dose from 40 mg to 60 mg, he “experienced Latuda-induced Akathisia for the first time” for approximately three hours. Dkt. # 1-2 ¶ 7. Subsequently, Plaintiff alleges that his dose was again increased from 60 mg to 80 mg, causing him to seek medical treatment on September 15, 2022 for “a panic attack secondary to several hours of acute Akathisia.” Id. ¶¶ 9–10. Plaintiff avers that he developed suicidal ideations during this second episode, and informed his wife that he “might need to kill [him]self if the doctor could not correct the Akathisia.” Id. ¶ 10. Plaintiff was treated with diphenhydramine, administered intravenously, and lorazepam, administered orally, then discharged with instructions to taper off Latuda and follow up with his psychiatrist and primary care physician. Id. ¶ 11. While this assisted in managing Plaintiff’s Akathisia symptoms in the short term, Plaintiff alleges that he needed to continue taking lorazepam on a longer- term basis in order to manage his withdrawal from Latuda. Id. ¶ 12. At this time, Plaintiff, who was employed as a trial prosecutor at the Seattle City Attorney’s Office, informed his Division Chief that he would likely need to take extended medical leave due to the adverse drug reaction that he had been experiencing. Id. ¶¶ 13–14. However, Plaintiff’s supervisor appears to have offered Plaintiff a “strictly filing position” within a different unit which allowed him to work “exclusively from home,” “required no court appearances whatsoever,” and “allow[ed Plaintiff] to keep [his] entire salary.” Id. ¶ 14. Plaintiff ultimately completed the withdrawal process and had fully discontinued taking Latuda by September 20, 2022. Id. ¶ 15. Plaintiff claims that his rapid withdrawal from Latuda, in less than a week, was “dangerous,” but “was necessary due to the acute suicidal ideations caused by the acute bouts of Akathisia.” Id. He explains that “managing the inevitable suicidal ideations that would be caused by rapid cessation of Latuda was better than managing the acute suicidal ideations that were already being caused by unpredictable acute bouts of Akathisia.” Id. Following his withdrawal from Latuda, on or about September 22, 2022, Plaintiff alleges that, “at the urging of [his] medical provider, [his] wife rented a storage unit” to store Plaintiff’s firearms due to his suicidal ideation. Id. ¶ 16. Five days later, on September 27, 2022, Plaintiff was seen at the University of Washington (“UW”) Medicine Primary Care Family Medicine at the Ravenna clinic and excused from work until October 11, 2022. Id. ¶ 18. On October 7, 2022, Plaintiff’s medical provider at the UW clinic in Ravenna recommended that Plaintiff work remotely until January of 2023. Id. ¶ 19. On November 5, 2022, Plaintiff was treated at the UW Montlake Emergency Department for suicidal ideation and insomnia. Id. ¶ 20. Plaintiff alleges that his chronic insomnia “continued for at least a year.” Id. ¶ 22. On the basis of the foregoing allegations, Plaintiff filed a Complaint for Damages in King County Superior Court, on March 10, 2025, captioned Christopher J. Stockwell v. Sumitomo Pharma America, Inc., Case No. 25-2-07674-1SEA. Dkt. # 1-2. Plaintiff brings the following causes of action against SMPA: (I) Negligence; (II) Strict Liability; (III) Failure to Warn; (IV) Breach of Warranty; and (V) Misrepresentation or Concealment. Dkt. # 1-2 at ¶¶ 24 –37. SMPA removed this case to federal court on March 19, 2025, on the basis of diversity jurisdiction pursuant to 28 U.S.C. § 1332. Dkt. # 1. SMPA subsequently filed the instant Motion on April 22, 2025, seeking dismissal of all of Plaintiff’s claims with prejudice. Dkt. # 16. Plaintiff filed his Response in opposition to SMPA’s Motion on May 8, 2025. Dkt. # 19. SMPA filed its Reply in support of its Motion on May 20, 2025. Dkt. # 20.

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Christopher J. Stockwell v. Sumitomo Pharma America, Inc., (W.D. Wash. 2026).

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