Showing posts sorted by date for query cyclosporine. Sort by relevance Show all posts
Showing posts sorted by date for query cyclosporine. Sort by relevance Show all posts

Saturday, September 28, 2019

Cyclosporine - USA


IPR decision: Sep 27, 2019

AIA Review #
Filing Date
Institution Date
Petitioner
Patent
Respondent
Status
IPR2016-01127
06/03/2016
12/08/2016
Mylan
8685930
Allergan, Inc.
Terminated-Dismissed
IPR2016-01128
06/03/2016
12/08/2016
Mylan
8629111
Allergan, Inc.
Terminated-Dismissed
IPR2016-01129
06/03/2016
12/08/2016
Mylan
8642556
Allergan, Inc.
Claims are unpatentable
IPR2016-01130
06/03/2016
12/08/2016
Mylan
8633162
Allergan, Inc.
Claims are unpatentable
IPR2016-01131
06/03/2016
12/08/2016
Mylan
8648048
Allergan, Inc.
Terminated-Dismissed
IPR2016-01132
06/03/2016
12/08/2016
Mylan
9248191
Allergan, Inc.
Terminated-Dismissed

On US’930 patent, Apotex, Famy Care, Teva & Akorn filed IPR petitions which were denied, terminated, terminated & instituted respectively.
On US’111 patent, Apotex, Argentum, Famy Care, Teva & Akorn filed IPR petitions which were denied, terminated, terminated, terminated & instituted respectively.
On US’556 patent, Apotex, Famy Care, Teva & Akorn filed IPR petitions which were denied, terminated, terminated & instituted respectively.
On US’162 patent, Apotex, Famy Care, Teva & Akorn filed IPR petitions which were denied, terminated, instituted & terminated respectively.
On US’048 patent, Apotex, Famy Care, Teva & Akorn filed IPR petitions which were denied, terminated, instituted & terminated respectively.
On US’191 patent, Famy Care, Teva & Akorn filed IPR petitions which were terminated, instituted & terminated respectively.

US 8,685,930 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a topical ophthalmic emulsion for treating an eye of a human having keratoconjunctivitis sicca, dry eye & or increasing tear production.

US 8,629,111 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a topical ophthalmic emulsion for treating an eye comprising cyclosporin A with certain excipients.

US 8,642,556 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a first topical ophthalmic emulsion for treating an eye comprising cyclosporin A with certain excipients.

US 8,633,162 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a method of treating dry eye disease comprising cyclosporin A with certain excipients.

US 8,648,048 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a method of increasing tear production in the eye comprising cyclosporin A with certain excipients.

US 9,248,191 (Allergan, Inc.; Exp: Aug 27, 2024) – OB listed
Claims a method of treating dry eye disease comprising cyclosporin A with certain excipients.

Saturday, March 2, 2019

Cyclosporine – USA


On Feb 26, 2019, District Court for the District of Columbia tossed Teva’s suit because of lack of standing as Teva didn’t show evidence that it would suffer an imminent injury.

Plaintiff, Teva brought this action to obtain “immediate injunctive and declaratory relief” barring the USFDA from “depriving [Teva] of its statutory right to 180 days of marketing exclusivity for its generic version of the brand-name drug Restasis®.” Teva alleges that it qualifies as the “first applicant” to submit a Paragraph IV certification for Restasis® and that, as a result, it is entitled to 180 days of generic exclusivity. Teva fears, however, that its statutory right will be extinguished once the FDA applies the interpretation of “first applicant” it recently espoused in a letter decision relating to another drug. To avoid that loss, Teva seeks a declaratory judgment that (1) the FDA’s interpretation of “first applicant” in that letter decision is invalid under the Administrative Procedure Act (“APA”) and that (2) Teva is entitled to the 180-day exclusivity period. Teva also seeks to enjoin the FDA from “approving any [ANDA] that references Restasis® . . . other than Teva’s ANDA” during the pendency of this litigation unless that ANDA meets Teva’s definition of “first applicant.”

Background:

Allergan received FDA approval to market Restasis®, a pioneer drug to treat dry eye, on December 23, 2002. Allergan originally listed two patents associated with Restasis® in the Orange Book: US 4,839,342 and US 5,474,979. The ‘342 patent expired on August 2, 2009, and the ‘979 patent expired on May 17, 2014. Shortly before the ‘979 patent expired, Allergan added five new Restasis®-related patents to the Orange Book, beginning with US 8,629,111, which issued on January 14, 2014. The ‘111 patent is the subject of the Paragraph IV certification at issue here.

Teva filed its ANDA for cyclosporine on January 23, 2012. At the time, the “only unexpired patent listed in the Orange Book” for Restasis® was the ‘979 patent. That patent was due to expire in May 2014, and Teva filed a Paragraph III certification, indicating that it intended to enter the market after the ‘979 patent expired. According to Teva, the FDA’s initial review of its ANDA was “plagued by irregularities.” Teva alleges that the FDA failed to act on its ANDA for nearly fifteen months. Finally, the FDA issued a letter “notif[ying] Teva that it was refusing” to receive “the company’s ANDA,”—a decision the agency later rescinded in June 2015. While Teva “was considering its response to the [FDA’s letter],” the USPTO issued the ‘111 patent. That same day—January 14, 2014—Teva amended its ANDA to include a Paragraph IV certification with respect to the ’111 patent. On July 9, 2015, thirty months after Teva submitted its ANDA, the FDA issued a formal acknowledgment letter deeming Teva’s ANDA “received . . . as of January 23, 2012.” Teva, in turn, timely dispatched its Paragraph IV notices to Allergan and the ‘111 patentees. Meanwhile, the FDA indicated that “one or more” ANDAs containing “[P]aragraph IV certifications to the ‘979 patent” were submitted “before January 14, 2014.”

In late 2015, the FDA opened a docket to solicit comments regarding the 180-day exclusivity period for generic cyclosporine. The FDA revealed that “one or more” applicants had filed an ANDA containing a Paragraph IV certification referencing the ‘979 patent before the ‘111 patent was issued on January 14, 2014; however, notice was not provided to the patent owners and NDA holder because the ‘979 patent expired before the FDA accepted any ANDA for review. The FDA then sought comment on two questions:

1.       Whether “[t]he one or more applicants that submitted ANDAs or patent amendments with [P]aragraph IV certifications” with respect “to the ‘979 patent” are “first applicants” for purpose of the 180-day exclusivity.
2.       Whether that  applicant (or those applicants) forfeited generic drug exclusivity “on May 17, 2014, when the ‘979 patent expired, such that no ANDA applicant for [c]yclosporine [o]phthalmic [e]mulsion, 0.05%, is eligible for 180-day generic drug exclusivity.

Six companies responded. Four answered yes to both questions. Teva and Akorn responded no. To date, the FDA has yet to issue a decision addressing either of these questions in the cyclosporine ANDA docket, and it has represented that it will not do so before it determines that an “ANDA applicant for cyclosporine has . . . satisfied the requirements for approval.”

In October 2016, the FDA published its final rule implementing portions of the MMA. According to Teva, the Final MMA Rule clearly provides that “eligibility for 180-day exclusivity requires timely notice of the exclusivity-qualifying Paragraph IV certification;” therefore, only those who have provided notice can qualify as first applicants. The FDA disagrees, arguing that the final rule “simply does not address the circumstance . . . where an applicant with a substantially complete ANDA containing a [P]aragraph IV certification is not able to provide valid notice . . . because the relevant patent expires before the FDA sends [the applicant] an Acknowledgement Letter.”

In July 2018, the FDA issued a letter decision in an unrelated matter, which addressed this question. (“Suboxone Letter Decision”). In that matter, “on May 14, 2013, one or more first applicants submitted a substantially complete ANDA (or an amendment to a substantially complete ANDA)” for a generic version of Suboxone® “with a Paragraph IV certification.” That applicant (or those applicants), however, subsequently withdrew their application(s) and “informed [the] FDA that [they] had not given notice to the NDA holder or patent owner.” “At least one other applicant submitted a substantially complete ANDA (or an amendment to a substantially complete ANDA)” referencing Suboxone® “after May 14, 2013, with a Paragraph IV certification and provided notice to the NDA holder and patent holder.” On those facts, the FDA concluded that the May 14, 2013 applicant qualified as the “first applicant” and, “[a]bsent forfeiture,” would have been “eligible for 180-day exclusivity.” The applicant, however, forfeited its right to exclusivity when it withdrew its application, and, because the “first applicant” did not qualify for 180-day exclusivity, the FDCA imposed “no barriers to approval of subsequent applicants.” Significantly, the FDA noted that exclusivity did not roll over to the subsequent applicant. FDA thus concluded that the “first effective approach” is inconsistent with “the statutory definition of ‘[f]irst [a]pplicant’ as defined by Congress in the MMA,” and that a “first submitted approach” better coheres with the current version of the FDCA. This event triggered the present suit among other things the preliminary injunction.

Present suit:

Court said that “a preliminary injunction is an extraordinary remedy never awarded as of right.” To secure a preliminary injunction, a plaintiff “must establish that he is likely to succeed on the merits that he is likely to suffer irreparable harm in the absence of preliminary relief, that the balance of equities tips in his favor, and that an injunction is in the public interest.” Court said that before applying the four-part test, however, the Court must address a threshold issue: whether it has jurisdiction over Teva’s claim.

Teva challenges the FDA’s interpretation of “first applicant” in the Suboxone Letter Decision and contends that, if allowed to stand, that reading of the MMA will deprive Teva of its statutory right to 180 days of generic exclusivity for cyclosporine. According to Teva, the FDA erred as a matter of substance because the MMA definition of “first applicant” not only requires that the applicant be the first to file a substantially complete ANDA, but also requires that the applicant timely effect notice (i.e., the “first effective approach”). Teva also argues that the Suboxone Letter Decision must be set aside because it was issued in violation of the procedural requirements of the APA. In support of its motion for preliminary relief, Teva contends that each of the relevant factors tip in favor of issuing a preliminary injunction. For the reasons explained above, Teva contends that it is likely to prevail on the merits. It further argues that, unless the FDA is enjoined, “application of the [Suboxone] Letter Decision to Teva’s cyclosporine ANDA will harm Teva irreparably by divesting the company of its statutory right to 180-day exclusivity and imposing at least $50 million in losses that Teva can never recover.” Finally, Teva maintains that the balance of hardships and public interest weigh in favor of granting a preliminary injunction.

Court said that it cannot reach the merits of Teva’s APA challenge or its motion for a preliminary injunction, without first addressing standing, and, as the record now stands, Teva has failed to clear that threshold hurdle. Teva contends that it has pled two types of injuries sufficient to establish standing:

Loss of Exclusivity:

The parties agree that the loss of generic exclusivity is a concrete injury sufficient to confer standing. They disagree, however, about whether Teva has met its burden of plausibly alleging or otherwise showing that it will suffer an actual and imminent injury that is fairly traceable to the Suboxone Letter Decision. Teva argues that “first applicant status” constitutes a property right “no different from a patent” and that the right exists “regardless of whether the exclusivity holder uses the right itself.” But court said that Teva’s theory of “embedded value” misconceives how the Hatch-Waxman Amendments and the MMA function and what Article III demands. Teva fails to identify any precedent that has ever held that a first applicant acquires a property interest akin to a patent as soon as it files a substantially complete ANDA containing a Paragraph IV certification and provides the requisite notice. Because first and foremost, a patent differs in fundamental respects from first applicant status. Nor is the Court convinced that a putative first applicant attains an alienable interest in its status immediately upon submitting its ANDA and effecting notice of the Paragraph IV certification. In sum, Teva has failed to “show that [it] ‘has sustained or is immediately in danger of sustaining some direct injury,’ as the result of the FDA’s Suboxone Letter Decision.

Future Loss of Right to Exclude:

Teva argues, in the alternative, that it will likely suffer a concrete injury in the near future if the Suboxone Letter Decision is allowed to stand and that this imminent harm is sufficient to sustain its standing to sue. It asserts, in particular, that it will suffer “tens of millions of dollars in lost sales due to the decreased market share it will have when [the] FDA unlawfully approves its competitors during what Teva alleges to be its legally-protected exclusivity period.” Court said that the cases cited by Teva are not controlling for present purposes. Teva will, accordingly, have the right—if it is a bona fide first applicant—to challenge a decision by the FDA permitting one its competitors (other than another first applicant) to proceed to market even before Teva’s ANDA is approved. Although the presence of tentative approval was not a sine qua non of Teva’s standing in that case, it was essential to the court’s finding that Teva’s alleged injury was certain and impending. Because there is no guarantee that the FDA will approve any of the existing ANDAs. Without tentative approval as a signal or any other indication about the status of the FDA’s review, the Court has no means of assessing whether any ANDA is likely to receive approval, and if so, when that is likely to occur. Moreover, even if the FDA eventually approves an ANDA for cyclosporine, the Court can only speculate about whether Teva’s ANDA will still be under review at that point. Most significantly, the FDCA includes six “forfeiture events” that result in a first applicant’s loss of “[t]he 180-day exclusivity period. The Court, accordingly, concludes that Teva’s asserted loss of exclusivity due to the FDA’s Suboxone Letter Decision fails to satisfy the causation and redressability requirements for Article III standing.

Court further said that Teva’s second claim to standing—that it was injured by the FDA’s failure to abide by the procedural requirements set forth in the APA—fares no better. Teva alleges that, because the FDA’s Suboxone Letter Decision “adopted precisely the opposite position from the one taken in its MMA regulations,” the FDA was required to (and did not) engage in notice-and-comment rulemaking. The Supreme Court, however, has held that the allegation of “a bare procedural violation, divorced of any concrete harm,” does not “satisfy the injury-in-fact requirement of Article III.” Here, the “essential injury” to Teva’s “own interest” is the potential loss of exclusivity. And, as explained above, the Court has concluded that the “chain of causation” between the FDA’s Suboxone Letter Decision and Teva’s alleged loss of exclusivity “is speculative at best.” The Court, accordingly, holds that Teva’s asserted procedural injury also fails to satisfy the constitutional minimum for standing to sue.

Wednesday, November 14, 2018

Cyclosporine – USA


On Nov. 13, 2018, Federal Circuit affirmed (Rule 36 judgment) Texas judge’s decision that patents covering Allergan’s Restasis® are invalid.

Previously, on Oct. 16, 2017, Judge Bryson of Eastern District of Texas issued an opinion & found patents [U.S. Patent Nos. 8,629,111; 8,633,162; 8,642,556; 8,648,048; 8,685,930 and 9,248,191] invalid as obvious (reported here on this blog).  In short, the obviousness dispute in this case centered on Allergan’s assertion that the Restasis formulation exhibited unexpected results compared to the prior art. Allergan stated that the prior art patent discloses ranges of amounts of cyclosporin (0.05% to 0.40%) and castor oil (0.625% to 5.0%) that cover Restasis. Allergan argued however, that the particular combination in Restasis of 0.05% cyclosporin and 1.25% castor oil is a critical value that produces unexpected results far better than would be expected for the range of values disclosed in prior arts. For that reason, Allergan contended that the critical value of 0.05% cyclosporin with 1.25% castor oil is patentable, even though it falls within the ranges disclosed and claimed in prior art patent. Court, however, found that a person of skill reviewing prior arts & the underlying Phase 2 data, would not conclude that the 0.1% cyclosporine /1.25% castor oil formulation was more effective than the 0.05% cyclosporin/0.625% castor oil formulation. A person of skill reviewing those papers would come to the conclusion that neither formulation was more effective than the other in Phase 2. That person of skill would reach the same conclusion for Phase 3. The court finally held that based on the extensive amount of pertinent prior art, Allergan is not entitled to renewed patent rights for Restasis in the form of a second wave of patent protection. The Court therefore held that while Allergan has proved by a preponderance of the evidence that the defendants have infringed the asserted claims of the Restasis patents, the defendants have proved by clear and convincing evidence that the asserted claims of the Restasis patents are invalid for obviousness.

Tuesday, October 24, 2017

Cyclosporine – USA

On Oct. 16, 2017, Judge Bryson of Eastern District of Texas issued an opinion & found Restasis® (Cyclosporine) patents invalid as obvious.

Restasis is an emulsion consisting of various components, including the active ingredient cyclosporin A, an immunosuppressant, which is dissolved in castor oil, a fatty acid glyceride. Restasis, is protected by six related patents, which are listed in orange book (OB) & are expiring on same date ie. Aug 27, 2024. The six Restasis patents are U.S. Patent Nos. 8,629,111 (“the ’111 patent”), 8,633,162 (“the ’162 patent”), 8,642,556 (“the ’556 patent”), 8,648,048 (“the ’048 patent”), 8,685,930 (“the ’930 patent”), and 9,248,191 (“the ’191 patent”). The defendants, Teva,  Akorn and Mylan are generic drug manufacturers that wish to manufacture and sell generic drug before expiration of OB listed patents.

A limitation that is common to all of the claims is the formulation for Restasis, which is an emulsion “comprising cyclosporin A in an amount of about 0.05% by weight; castor oil in an amount of about 1.25% by weight; polysorbate 80 in an amount of about 1.0% by weight; acrylate/C10-30 alkyl acrylate cross-polymer in an amount of about 0.05% by weight; glycerine in an amount of about 2.2% by weight; sodium hydroxide; and water”.

Invalidity Based on Obviousness:
The issue before court was whether the asserted claims of the Restasis patents would have been obvious in light of various combinations of prior art references, including the Ding I and Ding II patents and Sall.

The obviousness dispute in this case centered on Allergan’s assertion that the Restasis formulation exhibited unexpected results compared to the prior art. Allergan stated that the Ding I patent discloses ranges of amounts of cyclosporin (0.05% to 0.40%) and castor oil (0.625% to 5.0%) that cover Restasis. Allergan arguesd however, that the particular combination in Restasis of 0.05% cyclosporin and 1.25% castor oil is a critical value that produces unexpected results far better than would be expected for the range of values disclosed in Ding I. For that reason, Allergan contended that the critical value of 0.05% cyclosporin with 1.25% castor oil is patentable, even though it falls within the ranges disclosed and claimed in Ding I.

During the prosecution of the ’857 application Allergan “concede[d] [to the PTO] that it would have been obvious to modify examples 1A-1E of the Ding reference to arrive at Composition II [the Restasis formulation] of the present application.”  Allergan explained that the differences between Examples 1A-1E of the Ding I patent and the Restasis formulation “are insignificant”; that one of ordinary skill in the art “would readily envisage” the Restasis formulation; and that “there would have been a reasonable expectation of success” with the Restasis formulation. More than four years later, while prosecuting what became the Restasis patents, Allergan withdrew its concession and argued that the applications claiming the Restasis formulation were patentable over the Ding I patent because they showed unexpected results for the Restasis formulation as compared to the ranges claimed in Ding I and the particular examples disclosed in the specification of Ding I. As evidentiary support for that position, Allergan submitted Dr. Schiffman’s declaration to the examiner.

The Court found that statistical significance is an important component in establishing the reliability of the clinical data for a person of skill in the art. Stevenson’s paper, the published account of the Phase 2 results sponsored by Allergan, demonstrated the importance of statistics in drawing conclusions. Stevenson reported that there was no observed dose response, concluded that all tested concentrations performed effectively and safely, and counseled a person of skill to investigate both the 0.05% and 0.1% cyclosporin formulations. That peer-reviewed paper does not go so far as to say that the 0.1% formulation did best, or even that the 0.1% formulation did better than 0.05%.
Stevenson’s conclusions were corroborated by other persons of skill in the art, including Allergan’s own drug developers. Upon presenting the Phase 3 results to the FDA, Allergan explained that the performance of the 0.05% cyclosporin formulation was not surprising because the lack of a dose response—i.e., the similar level of efficacy for formulations containing 0.05% or more of cyclosporin—was observed earlier in Phase 2. After presenting the FDA with its plan to test the 0.1% formulation in Phase 3, Allergan acknowledged that “[b]ecause we did not show a clear differentiation in effect among the doses [in Phase 2], it was recommended [by the FDA] that we include a lower concentration [0.05% cyclosporin] in one Phase 3 clinical trial to confirm that we have chosen the lowest effective concentration.”

For those reasons, the Court found that a person of skill reviewing Stevenson alone, or even Stevenson in combination with all the underlying Phase 2 data, would not conclude that the 0.1% cyclosporine /1.25% castor oil formulation was more effective than the 0.05% cyclosporin/0.625% castor oil formulation. A person of skill reviewing those papers would come to the conclusion that neither formulation was more effective than the other in Phase 2. That person of skill would reach the same conclusion for Phase 3.

Court further said that to the extent Allergan relies on Dr. Schiffman’s presentation to the PTO, it found that the presentation made to the examiner in 2013, including Dr. Schiffman’s declaration and the accompanying exhibits, painted a false picture of the comparative results of the Phase 2 and Phase 3 trials. Also the FDA’s Medical Review does not support Allergan’s claim of unexpected results & the success of Restasis would not have been surprising to a person of skill in the art in 2003.

Allergan had also pointed to evidence of objective considerations such as commercial success and long-felt unmet need, however the force of that evidence is considerably blunted by the fact that, based on protection from a succession of patents, Allergan was able to foreclose competition in cyclosporin/glyceride emulsion formulations from the early 1990s until 2014. And the issuance of the Restasis patents has barred any direct competition for Restasis since then. The evidentiary value of the objective consideration evidence has thus been considerably weakened by the existence of blocking patents during the critical period.

Thus court finally held that based on the extensive amount of pertinent prior art and the Court’s factual assessment of Allergan’s showing of unexpected results, the Court has concluded that Allergan is not entitled to renewed patent rights for Restasis in the form of a second wave of patent protection. The Court therefore holds that while Allergan has proved by a preponderance of the evidence that the defendants have infringed the asserted claims of the Restasis patents, the defendants have proved by clear and convincing evidence that the asserted claims of the Restasis patents are invalid for obviousness.