• The Supreme Court's decision in _Merck Sharp & Dohme Corp. v. Albrecht_ has significantly impacted preemption defenses in pharmaceutical litigation, particularly concerning failure-to-warn claims.
• The Fosamax multidistrict litigation (MDL) has been directly affected, with the initial ruling against certain claims reversed, leading to ongoing legal debate and reinterpretation.
• Legal interpretations of preemption, including the FDA's role and the evidence required for conflict preemption, are being actively re-evaluated in light of the _Albrecht_ decision.