McKesson Corporation v. Pain Management Company LLC and Brian Dunleavy

District Court, E.D. Pennsylvania·Decided September 2, 2026·No. 2:26-cv-00285·Unknown

Opinion

IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF PENNSYLVANIA

MCKESSON CORPORATION, CIVIL ACTION

Plaintiff & Counter-Defendant, NO. 26-285-KSM v.

PAIN MANAGEMENT COMPANY LLC and BRIAN DUNLEAVY,

Defendants & Counter-Plaintiffs.

MEMORANDUM Marston, J. September 2, 2026 Motions to dismiss must take a plaintiff’s allegations as they are, not how they would like them to be. Here, McKesson Corporation (“McKesson”) has done that, but only in part; so, we will rule similarly on its Motion to Dismiss. McKesson has filed suit for breach of contract and unjust enrichment against Pain Management Company LLC and its owner Brian Dunleavy (collectively, “PMC”) due to PMC’s alleged failure to pay for pharmaceutical products purchased on credit. (See Doc. No. 1 at 1.) PMC answered and asserted three counterclaims for breach of contract (Count I), breach of the implied warranty of good faith and fair dealing (Count II), and tortious interference with contract (Count III). (See Doc. No. 14.) McKesson has moved to dismiss each of these counts. For the reasons discussed below, we will grant McKesson’s Motion to Dismiss for Count II but deny it as to Counts I and III. Though, PMC will be given leave to amend Count II, if it can do so in good faith. I. FACTUAL BACKGROUND Taking the allegations in PMC’s Answer and Counterclaims (Doc. No. 14) as true,1 the relevant facts are as follows: PMC is a pharmacy that almost exclusively supplies controlled substances and medications to patients suffering from chronic pain. (See id. at ¶ 86.) On February 27, 2023,

PMC entered into the “Pathway Enhancement Addendum” (hereinafter, “the Addendum”) with McKesson, a pharmaceuticals distributor. (See id. at ¶¶ 78, 81.) The Addendum “permits the sale of controlled substances and other medications from [McKesson] to . . . PMC,” which PMC would then use to fulfill its patient’s subscriptions. (Id. at ¶¶ 83–84.) The Court will first discuss the parties’ business relationship under and the eventual termination of the Addendum, before discussing PMC’s allegations relating to the Mallinckrodt List, a list of pharmacies that the pharmaceutical manufacturer Mallinckrodt will not do business with. A. Allocation Changes PMC alleges that roughly a year and a half after signing the Addendum, favorable market conditions drove a surge in patient demand for PMC’s services, expanding PMC’s customer base

between August 2024 and September 2025. (See id. at ¶¶ 85–87.) As a result, PMC requested increased quantities of the controlled substances, which had to be “Allocated” by McKesson to PMC. (See id. at ¶ 89.) Allocation is a “a limiting mechanism used by medication wholesalers and distributors to prevent hoarding of medications at pharmacies; ensure that medication supplies are dispensed to pharmacies at an amount appropriate to regional need; to prevent abuse of medications allowing for too high of a quantity in circulation.” (Id. at ¶ 90.) When assessing

1 “The District Court, in deciding a motion under Federal Rule of Civil Procedure 12(b)(6), [i]s required to accept as true all factual allegations in the complaint and draw all inferences from the facts alleged in the light most favorable to [the plaintiff].” Phillips v. County of Allegheny, 515 F.3d 224, 228 (3d Cir. 2008). whether to Allocate, companies perform due diligence assessments to ensure that the increase request is not rooted in a “nefarious” purpose. (Id. at ¶ 94.) McKesson, after performing these due diligence assessments on PMC’s Allocation requests, granted PMC’s first application for Allocation in March 2025, but ultimately denied

PMC’s second application in August 2025. (See id. at ¶¶ 97, 116.) Part of McKesson’s justification for rejecting the second Allocation request was concerns regarding a specific physician and the prescriptions they were ordering for a patient. (See id. at ¶ 111.) PMC was the pharmacy that filled that patient’s medications. (See id. at ¶ 107.) After the denial of PMC’s second Allocation request, McKesson suspended PMC from its distribution chain but gave “no substantiated rationale” for the decision. (See id. at ¶ 118.) B. Termination of Addendum and Aftereffects PMC alleges that McKesson violated Section 42 of the Pathway Enhancement Addendum through this suspension. (See id. at ¶ 137.) Specifically, because McKesson chose to terminate

2 The relevant portion of Section 4 of the Pathway Enhancement Addendum reads: Member [PMC] or Distributor [McKesson] may effect an early termination of this Addendum only in the following circumstances . . . “Member or Distributor may effect an early termination of this Addendum upon the occurrence of a material, as determined in good faith by the non- breaching Party, breach by the other Party. The non-breaching Party must give written notice to the breaching Party of the occurrence of such breach. The notice must describe in detail the nature of the breach. The breaching Party will have the opportunity to cure its breach to the reasonable satisfaction of the non-breaching Party during a sixty (60) day period beginning on the date the breaching Party receives the written notice (the “Cure Period”). In the alternative, if such breach is of a nature that it cannot be cured in sixty (60) days, the breaching Party must commence and diligently prosecute in good faith the cure of such breach within the Cure Period and cure such breach within ninety (90) days. If the breach is not cured by the expiration of the Cure Period, or the breaching Party does not cure the breach within ninety (90) days under the circumstances permitted in the foregoing sentence, then the non-breaching Party may provide the agreement, they failed to abide by the Section 4(a) requirements to: (1) “supply [PMC] with a first written notice”; (2) detail “in writing, alleged matters of [PMC’s] breach”; (3) “allow [PMC] a 60-day period to cure any alleged breaches”; (4) furnish “[PMC] with a second written notice”; and (5) “provide [PMC] with a 30-day period, for which at the end of that

period, the Addendum would be deemed terminated.” (Id. at ¶¶ 141–145.) Instead, via telephone, Plaintiffs unilaterally terminated the agreement on August 4, 2025. (See id. at ¶¶ 147–148.) As a result of the termination of the Addendum, PMC’s “stock of controlled substances . . . ran dry and PMC could no longer satisfy fulfilling controlled prescriptions at all.” (Id. at ¶ 151.) This caused PMC to lose patients to other pharmacies and hurt PMC’s relationships with prescribing physicians. (See id. at ¶¶ 152–157.) Further, because PMC’s relationships with other medication wholesalers, such as Real Value RX and Health Mart Atlas, were interconnected with its business relationship with McKesson, McKesson’s termination had a cascading effect on those third-party business relationships. (Id. at ¶¶ 165–176.) McKesson was

aware of these agreements and PMC’s engagements with these third-party wholesalers when it decided to terminate the Addendum. (Id. at ¶¶ 168–69.) Additionally, an on-site investigation of PMC by the Pennsylvania Attorney General was triggered by a complaint McKesson filed in or around August 2025 with the Pennsylvania State Board. (See id. at ¶¶ 158–159.) Though no prosecution was eventually pursued, McKesson’s complaint stayed on PMC’s record, and “harmed its business reputation with future wholesalers.” (Id. at ¶¶ 161, 163.)

Free access — add to your briefcase to read the full text and ask questions with AI

McKesson Corporation v. Pain Management Company LLC and Brian Dunleavy, (E.D. Pa. 2026).

McKesson Corporation v. Pain Management Company LLC and Brian Dunleavy (McKesson Corporation v. Pain Management Company LLC and Brian Dunleavy) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

Related

Erie Railroad v. Tompkins
304 U.S. 64 (Supreme Court, 1938)
Bell Atlantic Corp. v. Twombly
550 U.S. 544 (Supreme Court, 2007)
Ashcroft v. Iqbal
556 U.S. 662 (Supreme Court, 2009)
Burtch v. Milberg Factors, Inc.
662 F.3d 212 (Third Circuit, 2011)
Phillips v. County of Allegheny
515 F.3d 224 (Third Circuit, 2008)
Fowler v. UPMC SHADYSIDE
578 F.3d 203 (Third Circuit, 2009)
Dunlap v. State Farm Fire & Casualty Co.
878 A.2d 434 (Supreme Court of Delaware, 2005)
Miller v. Allstate Insurance Co.
763 A.2d 401 (Superior Court of Pennsylvania, 2000)
Kuroda v. SPJS Holdings, L.L.C.
971 A.2d 872 (Court of Chancery of Delaware, 2009)
VLIW TECHNOLOGY, LLC v. Hewlett-Packard Co.
840 A.2d 606 (Supreme Court of Delaware, 2003)
U.S. Claims, Inc. v. Yehuda Smolar, PC
602 F. Supp. 2d 590 (E.D. Pennsylvania, 2009)
Atron Castleberry v. STI Group
863 F.3d 259 (Third Circuit, 2017)
Bhole, Inc. v. Shore Investments, Inc.
67 A.3d 444 (Supreme Court of Delaware, 2013)