Lord knows, there are a lot of meritless MDLs.  Bexis’ and Michelle’s Bone Screw litigation, prompted by a televised CYA freak-out by then-FDA Commissioner David Kessler over an off-label use that had become the medical standard of care, was one, and it gave us Buckman.  Several MDLs against modern anticoagulants, such as Xarelto, are another example, since all of those second-generation drugs were safer than the older forms of blood thinners they superseded.  Currently, the Taxotere MDL – based on the dubious proposition that the plaintiffs cared more about hair loss than most effectively treating their breast cancer – and Zostavax – where not a single plaintiff can prove causation – come to mind.  Our colleagues defending other MDLS can also be excused for believing that their own litigation should be added to this list.

But for sheer factual baselessness, it would be hard to top the still-ongoing Avandia MDL, which somehow has managed to persist since 2007.  The Avandia litigation is infamously based on a purported increased risk that, over a decade ago, the FDA scientifically determined did not exist.  Briefly, a study erroneously found an increased risk of cardiovascular events with Avandia that led to both a boxed warning and additional studies.  The additional studies debunked that supposed increased risk and the FDA removed the boxed warning: