OPINION
In this multi-district product liability case, Plaintiffs-Appellants — certain current and past consumers of the diet-drug Meridia, whose actions were transferred to, or originated in,‘.the Northern District of. Ohio — appeal the. district court’s grant of summary judgment in- favor of Defendants-Appellees, the pharmaceutical company that marketed and distributed Meri-dia and its affiliates. Plaintiffs argue on appeal that the district court (1)- failed to conduct a meaningful choice-of-law analysis, (2) erred in partly excluding the testimony of one of Plaintiffs’ experts, and (3) erred in granting summary judgment to Defendants ■ as to Plaintiffs’ various common law and statutory claims. For the reasons that follow, we AFFIRM the district .court’s grant of summary judgment.
I.
This litigation was occasioned by the diet-drug Meridia. First developed in 1980 as an anti-depressant by Boots Pharmaceuticals, Meridia works by slowing the body’s dissipation of serotonin and norepi-nephrine, brain chemicals that affect satiety and impulse control. Meridia originally failed to gain Food and Drug Administration (“FDA”) approval. In 1990, the rights to Meridia were purchased by Knoll Pharmaceuticals, which began to test the drug’s potential to effectuate weight loss. In 1997, the FDA approved the marketing and sale of Meridia as a prescription diet-drug, which Knoll began to market in 1998. In 2001, Abbott Laboratories (“Abbott Labs”) acquired Knoll. Abbott Labs now markets Meridia to doctors, pharmacies, and directly to consumers.
On March 19, 2002, a consumer watchdog group petitioned the FDA to remove Meridia from the market, alleging the drug to be ineffective and unsafe. In the wake of that petition, plaintiffs across the United States brought suit against Abbott Labs. Although peripheral to the present *864 appeal, these plaintiffs also sued the doctors who prescribed Meridia and the pharmacies that sold it. The plaintiffs claimed to have incurred various injuries — e.g., heart attack, stroke, tachycardia, palpitations, chest pain, high blood pressure, and death — and claimed that Meridia is ineffective.- The plaintiffs also claimed that they were at increased risk of developing a future injury. Some of the claims were filed originally in federal court, and Abbott Labs, which is an Illinois company, removed many of the state court claims on the ground of diversity.
In August of 2002, with the approval of the litigants, the Judicial Panel on Multi-District Litigation (“MDL Panel”) transferred the pending federal cases to the United States District Court for the Northern District of Ohio, pursuant to 28 U.S.C. § 1407. In all, nearly 100 Meridia actions from 18 states 1 were consolidated and assigned to the Honorable James S. Gwin. Following pretrial proceedings and discovery, Plaintiffs filed a Master Class Action Complaint (“MCA Complaint”) and a Motion for Class Certification. The MCA Complaint alleged nine grounds for relief: (1) strict liability, (2) negligence, (3) negligence per se, (4) violation of statutory consumer protection, (5) 'unjust enrichment, (6) medical monitoring, (7) breach of express warranty, (8) breach of implied warrant, and (9) “corporate responsibility.” Plaintiffs requested compensatory damages, punitive damages, attorneys’ fees, and “such other or further ... relief as may be appropriate under the circumstances.”
Abbott Labs filed various motions in response. First, it filed a motion to ex-elude all of Plaintiffs’ expert witnesses. Second, it filed a motion for summary judgment, pursuant to Federal Rule of Civil Procedure 56(c), with respect to all claims. Third, it filed a memorandum in opposition to Plaintiffs’ motion for class certification. The district court denied Abbott Labs’s motion to exclude Plaintiffs’ experts, except that it granted in part Abbott Labs’s motion with respect to Arnold Schwartz, Ph.D. — as a pharmacologist, Dr. Schwartz was not permitted to testify as to the physiological effects of high blood pressure. The court granted Abbott Labs’s motion for summary judgment with respect to all issues.
See In re Meridia Prods. Liab. Litig.,
The court declined to rule on Plaintiffs’ motion for class certification.
See Miami Univ. Wrestling Club v. Miami Univ.,
II.
Nearly 100 actions from 18 states were transferred to one district, pursuant *865 to 28 U.S.C. § 1407(a), for the purpose of conducting consolidated pretrial proceedings. Plaintiffs argue on appeal that the district court failed to conduct a meaningful choice-of-law review before granting summary judgment in favor of Abbott Labs, and that this case must therefore be remanded. We disagree.
Plaintiffs cite to
Van Dusen v. Barrack,
Typically, we review a district court’s choice-of-law analysis
de novo. See Power-Tek Solutions Servs., LLC v. Techlink, Inc.,
In the course of fashioning the applicable conclusions of law, moreover, the district court consistently erred on the side of caution. For instance, acknowledging a conflict among jurisdictions, the court “presume[d] for purposes of this case that advertisements are sufficient to create express warranties.”
In re Meridia,
Plaintiffs did argue before the district court that the learned intermediary doctrine — which shields drug manufacturers from liability when a properly informed professional administers their product— should not apply to the New Jersey plaintiffs. To the extent that New Jersey law applies to any participant in this litigation, Plaintiffs’ argument is correct. In
Perez v. Wyeth Lab., Inc.,
In short, because Plaintiffs waived the argument, no basis exists for us to remand this case to the district court for an individualized choice-of-law analysis.
*866 III.
Although the heart of Plaintiffs’ challenge on appeal is that the district court failed to conduct a meaningful choice-of-law analysis, Plaintiffs also argue that the court erred in its application of the summary judgment standard, and in partially excluding the testimony of one of Plaintiffs’ experts. These challenges to the district court’s decision fail.
A.
We review a district court’s grant of summary judgment
de novo. Miles v. Kohli & Kaliher Assocs., Ltd.,
As an initial matter, we find no fault with the district court’s treatment of the causation factor, which is an element common to the bulk of Plaintiffs’ claims. Plaintiffs argued on summary judgment,
inter alia,
that Meridia’s warning label constitutes an admission that Meridia can cause injury. The district court agreed. The court first concluded that neither epidemiological nor expert evidence is necessary to a finding of causation.
Cf.
Restatement (Second) of Torts § 7 (Comment B);
Daubert v. Merrell Dow Pharms, Inc.,
Abbott Labs invites this Court on appeal to hold that an FDA-required warning label can never create a triable issue of fact with respect to causation. This is so, Abbott Labs argues, because a regulatory agency’s threshold of proof is lower than that appropriate in tort law, see
Allen v. Pa. Eng’g Corp.,
That said, the strong wording of the label undermines Plaintiffs’ claim that Meridia’s warning was inadequate. The
*867
district court began its discussion of adequacy by noting that the vast majority of jurisdictions — 45 out of 50 states — apply the learned intermediary doctrine to product liability claims.
Id.
at 812 n. 18 (citing
Thom v. Bristol-Myers Squibb Co.,
Physicians become learned intermediaries only when they have received adequate warnings from the drug manufacturer. Although the adequacy of warnings concerning .drugs is generally a question of fact, it can “become a question of law where the warning is accurate, clear and unambiguous.” An adequate warning of an unapparent risk is one that is reasonable under the circumstances.
Thom,
The district court found that Meridia’s label, which states,
inter alia,
that “MER-IDIA SUBSTANTIALLY ' INCREASES BLOOD PRESSURE IN SOME PATIENTS” and that “REGULAR MONITORING OF BLOOD PRESSURE IS REQUIRED WHEN PRESCRIBING MERIDIA,” was adequate, in this case, to warn the learned intermediary. We agree with the district court- that “[pjhysicians are well aware of the scope of the risks associated with increased blood pressure and do not need-specifics regarding the possible consequences of blood pressure increases.”
In re Meridia,
• Under New Jersey law, the learned intermediary doctrine does not apply to drugs marketed directly to consumers. The district- court found that even absent the doctrine, Meridia’s label was adequate as a matter of law. More importantly, however; the New Jersey Supreme Court -has held that the approval- of a warning label by the FDA creates a presumption of adequacy.
Perez,
Plaintiffs also allege that the -warning label for - Meridia’s European equivalent contains more detailed instructions for the treating physician. Citing no authority, Plaintiffs argue' that the difference .in instructions creates a -triable issue of fact. We disagree. American regulators have different priorities and deal with often more diverse populations than their European counterparts. The issue is whether the United States label — which instructs, for instance, that when a patient “has not lost at least-4 pounds in the first 4 weeks of treatment, the physician should consider a reevaluation,of therapy” — provides adequate instructions upon which a physician may safely base her treatment strategy. Plaintiffs have failed to make a showing of inadequacy" such that a reasonable jury could find for the nonmoving party.
Finally, Pláintiffs devote less than 'a page of their brief to a global challenge to the district court’s opinion: Plaintiffs maintain that “[t]he district court’s opinion is marked throughout by .a pervasive failure to consider all of the evidence and to construe it in the light most favorable to
*868
plaintiffs.” Although a district court has this obligation,
see Birch,
B.
In the course of granting summary judgment in favor of Abbott Labs, the district court excluded as inexpert part of the testimony of Arnold Schwartz, Ph. D., an indisputably qualified pharmacologist. Specifically, the court would not permit Dr. Schwartz’s to testify on the health effects of heightened blood pressure, or to testify that Meridia’s health risks outweigh its benefits. We review the exclusion of expert testimony for abuse of discretion,
see Kumho Tire. Co. v. Carmichael,
As the Supreme Court explained in
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
In this case, the district court found that Dr. Schwartz is a qualified pharmacologist, with an attendant expertise on the effects of drugs on the body. Accordingly, the court admitted his testimony as to what Meridia does:
inter alia,
it temporarily elevates blood pressure in some patients. The court found, however, that Dr. Schwartz is not an expert on the effects of high blood pressure on the human body. Dr. Schwartz testified that Meridia may increase blood pressure, and that this increase poses a risk to heart health that outweighs any corresponding cardiac benefit of weight loss. In excluding that testimony, the court noted that Dr. Schwartz is not a cardiologist, and that he “shows no training or experience allowing him to answer this question.” Moreover, the court found that Dr. Schwartz’s opinions on this subject lacked foundation and left the court “to rely solely on his subjective judgments.”
In re Meridia,
In short, the district court did not abuse its discretion; the court faithfully articulated and applied the relevant factors in partially excluding Dr. Schwartz’s testimony.
IV.
The district court’s order dismissed “all of the claims against Defendants Abbott Laboratories, Abbott Laboratories International Co., Abbott Laboratories, Inc., and Knoll Pharmaceuticals Co.” In their Master Class *869 Action Complaint, Plaintiffs selected nine individuals from the many lawsuits transferred to the Northern District of Ohio by the MDL Panel to serve as named plaintiffs for what they hoped would be a nationwide class. Plaintiffs urge this Court to hold that, because the district court declined to rule on their motion for class certification, only these nine named plaintiffs are bound by the district court’s opinion.
Courts have held that summary adjudication prior to class certification binds only the named plaintiffs.
See, e.g., Wright v. Schock,
V.
For the preceding reasons, we AFFIRM the district court’s grant of summary judgment.
Notes
. These states are: Alabama, Arizona, Arkansas, California, Illinois, Indiana, Kentucky, Louisiana, Minnesota, Missouri, Nebraska, Nevada, New Jersey, Ohio, Pennsylvania, Tennessee, Texas, and Wisconsin. No plaintiff was actually from Illinois, where Abbott Labs is incorporated. Rather, residents of Indiana and Pennsylvania filed suit in the Northern District of Illinois. See Cardwell v. Abbott Labs., et al, No. 1:02-cv-02183 (N.D.Ill. Aug. 15, 2002).
