The facts of this case are detailed in
Raymond v. Eli Lilly & Co.,
The federal district court denied the motions for summary judgment applying principles underlying the so-called
“Shillady rule”
that “actions for malpractiсe based on the leaving of a foreign object in a patient's body do not accrue until the patient learns or in the exercise of reasonable care and diligence should have learned of its presence.”
Shillady v. Elliot Community Hosp.,
Rather than proceeding with the trial on the merits, there was an interlocutory appeal to the United States Court of Appeals for the First Circuit. 28 U.S.C. § 1292(b); Fed. R. App. P. 5. The
*167
Court of Appeals certified the following question to this court: “Does the
Shillady
rule toll the running of New Hampshire’s six-year statute of limitations until the time of the discovery of the cause of action in a case in which the plaintiff’s injury was allegedly caused by a drug and the plaintiff, exercising reasonable diligence, did not learn of the possible causal connection between the drug and her injury until two or three years after the injury occurred?” We are authorized to answer questions certified to us by the First Circuit Court of Appeals, RSA 490: App. R. 20 (Supp. 1975), and have done so in the past.
E.g., Bellotte v. Zayre Corp.,
Our threshold task is to delineate the scope of our inquiry in answering the certified question. A significant portion of the defendant’s brief and oral argument contests the district court’s determination of the date upon which Mrs. Raymond discovered her cause of action against the defendant. We will not consider why the court concluded that the plaintiffs did not know, and in the exercise of reasonable diligence could not have known, of the cause of action against the defendant prior to 1970 or 1971. The certified question itself forecloses this inquiry because it presupposes a plaintiff who exercises reasonable diligence but, nevertheless, does not learn of the potential causal relationship between the drug and her injury until two or three years aftеr the injury occurred. Therefore, our only inquiry in this case is whether, in a products liability case in which the plaintiff is allegedly injured by a drug, the principles underlying the Shillady rule will prevent the statute of limitations from beginning to run until the plaintiff discovers or has a reasonable opportunity to discover that she has suffered a legal injury for which the defendant may be liable.
The statute of limitations applicable in this case provides that “personal actions may be brought within six years after the cause of action accrued, and not afterwards.” RSA 508:4 (Supp. 1975). The statute does not define the word “accrued.” In the absence of a statutory definition, the time of accrual is left to judicial determination.
New Bedford v. Lloyd Investment Ass’n,
White v. Schnoebelen,
White
did not involve, as this case does, the problem of accrual when there is a delay betwеen the date of injury and the date upon which the plaintiff discovers the causal relationship between the injury and the wrongdoing. In fact, if anything, the
White
rule assumes that the plaintiff knows of the cause of his injury at the moment he suffers harm. With obvious reference to
White v. Schnoebelen,
we have stated that “[i]n the usual tort case some
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physical impact would serve to notify the plaintiff of the violation of her rights and there is no reason why the time within which her action for the resulting damages must be brought should not start to run from that datе.”
Shillady v. Elliot Community Hosp.,
On two occasions we have dealt with the problem of accrual where, as in this case, a person was harmed but did not discover that he had a claim against the tortfeasor until a later date. In a case in which the defendant fraudulently concealed facts necessary to put the injured person on notice of his claim, we held that the causе of action accrued not when the injury occurred, but rather when the plaintiff discovered or in the exercise of reasonable diligence should have discovered the concealed facts.
Lakeman v.
La
France,
The concept that a cause of action does not accrue until' the plaintiff knows or should reasonably know of the causal connection between his injury and the defendant’s wrongdoing has been called the discovery rule.
Lopez v. Swyer,
The discovery rule is based upon equitable considerations; in determining whether and how the rule should be applied we must identify, evaluate, and weigh the interests of the opposing parties.
Shillady v. Elliot Community Hosp.,
One might read several discovery rule cases and conclude that the courts are applying two substantively distinct rules. In most cases the courts frame the rule in terms of the plaintiff’s discovery of the causal relationship between his injury and the defendant’s conduct. In some cases, including Shillady, a court will simply state that, under the discovery rule, a cause of action accrues when the plaintiff discovers or should have discovered his injury. Still other courts use both statements of the rule within the same case. The reason for these appаrent differences is that in most cases in which the court states the rule in terms of the discovery of the injury, the injury is the kind that puts the plaintiff on notice that his rights have been violated. Thus, there is no reason for the court to express the rule in terms of the discovery of the causal connection between the harm and the defendant’s conduct. In a case such as the one before us, in which the injury and the discovery of the causal relationship do not occur simultaneously, it is important to articulate exactly what the discovery rule means. We believe that the proper formulation of the rule and the one that *171 will cause the least confusion is the one adopted by the majority of the courts: A cause of action will not accrue under the discovery rule until the plaintiff discovers or in the exercise of reasonable diligence should have discovered nоt only that he has been injured but also that his injury may have been caused by the defendant’s conduct.
One of the first product liability cases in which the discovery rule was applied was
R. J. Reynolds Tobacco Company v. Hudson,
Recently, several more courts have applied the discovery rule in prоducts liability cases. Annot.,
Statute of Limitations: When Cause of Action Arises on Action Against Manufacturer or Seller of Product Causing Injury or Death,
In
Gilbert v. Jones,
The defendant argues that three cases in particular support its view that Mrs. Raymond’s cause of action accrued when she first experienced difficulties with her vision, not when she discovered that the drugs may have caused the injury. The first case is
Allen v. Ortho Pharmaceutical Corp.,
The second case,
Patrick v. Morin,
In the last case,
Berry v. G. D. Searle & Co.,
Having reviewed the case law, we now consider whether adopting the discovery rule in a drug-products liability case would be equitable.
Shillady v. Elliot Community Hosp.,
With respect to the problem of lost or inaccurate evidence due to the passage of time, several reasons exist why the potential for prejudice to the defendant is not significant in a drug cаse of this kind. Most of the evidence necessary to prove or defend against liability is likely to be documentary in nature. It is not the kind of evidence that is lost or becomes unreliable as time passes. Companies generally compile and maintain research records that document the extent of their knowledge of the harmful propensities of their drugs. Certainly, doctors and hospitals meticulously maintain and store records of patient treatments. Note,
Recent Developments in Wisconsin Medical Malpractice Law,
One of the principal justifications for applying the discovery rule in medical malpractice cases is that it provides protection against substandard medical care. Note,
supra
at 896. Protection against the manufacture and distribution of harmful drugs is also desirable and necessary. The additional burdens placed upon the defendant by the discovery rule are justified if they cause the defendant to conform to a higher standard of care.
Fernandi v. Strully,
In a final attempt to prevent an affirmative answer to the certified question, the defendant argues that Mrs. Raymond’s action should be barred because, even after she discovered her cause of action, shе still had a reasonable amount of time within which to sue. The defendant takes the position that the discovery rule should apply only where the plaintiff discovers his claim after the statutory time has already expired or the time left within which to sue is unreasonably short. In so arguing, the defendant fundamentally misconceives the issue before us. Our task is to deter-\ mine when a cause of action accrues. It is at that point that the / limitation periоd commences. From that date the plaintiff is statu-] torily entitled to no less than six years within which to file his] claim. If we adopted the defendant’s position, Mrs. Raymond would' have only three or four years from the date of accrual within which to sue, contrary to the explicit wording of the statute. A simple example further exposes the weakness of the defendant’s argument. If a person injured in 1977 discovers his cause of action in 1980, he has, under the dеfendant’s proposal, three more years or until 1983 to sue. If another person is injured on the same day in 1977 but discovers his cause of action six or more years after his *176 injury, say in 1984, he has six more years or until 1990 to sue. This reasoning puts the late discovering plaintiff in a more favorable position than the person who discovers his claim relatively early. We cannot permit an interpretation of the word “accrual” to produce such illogical results.
Analysis of the case law and the equitable considerations cause us to answer “Yes” to the certified question.
So ordered.
