Gilead Tenofovir Cases
Annotate this Case
In the case before the Court of Appeal of the State of California First Appellate District Division Four, the plaintiffs, thousands of individuals who suffered adverse effects from the use of a prescription drug, TDF, made by Gilead Life Sciences, Inc., brought a claim of negligence and fraudulent concealment against Gilead. The plaintiffs alleged that while Gilead was developing TDF, it discovered a similar, but chemically distinct and safer potential drug, TAF. However, Gilead allegedly decided to defer development of TAF because it was concerned that the immediate development of TAF would reduce its financial return from TDF. Gilead sought summary judgment on the ground that in order to recover for harm caused by a manufactured product, the plaintiff must prove that the product was defective. The trial court denied Gilead's motion for summary judgment in its entirety.
In reviewing this case, the appellate court held that the trial court was correct to deny Gilead's motion for summary judgment on the negligence claim. The court reasoned that a manufacturer's duty of reasonable care can extend beyond the duty not to market a defective product. The court found that the factual basis of the plaintiffs' claim was that Gilead knew TAF was safer than TDF, but decided to defer development of TAF to maximize its profits. The court held that if Gilead's decision to postpone development of TAF indeed breached its duty of reasonable care to users of TDF, then Gilead could potentially be held liable.
However, the appellate court reversed the trial court's decision regarding plaintiffs' claim for fraudulent concealment. The court concluded that Gilead's duty to plaintiffs did not extend to the disclosure of information about TAF, as it was not available as an alternative treatment for HIV/AIDS at the time the alleged concealment occurred. Consequently, the court granted in part and denied in part Gilead's petition for a writ of mandate, directing the superior court to vacate its order denying Gilead's motion for summary judgment and to enter a new order denying summary adjudication of the negligence claim but granting summary adjudication of the fraudulent concealment claim.
Some case metadata and case summaries were written with the help of AI, which can produce inaccuracies. You should read the full case before relying on it for legal research purposes.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.