Express Scripts and the PBM trade group PCMA have filed suit to block implementation of Tennessee’s FAIR Rx Act, following complaints similar to those submitted by CVS Caremark. The legislation, passed earlier this year amid opposition from PBMs, is intended to restructure parts of the pharmacy benefit manager market and alter how pharmacies are carved out and contracted. The dispute keeps regulatory risk elevated for PBM business models and raises the possibility of further injunctions or procedural delays while courts review the claims. For biotech and healthcare stakeholders, the outcome can indirectly influence medication access and formularies—key channels affecting utilization of prescription therapies. The litigation also signals that affected stakeholders are moving quickly through legal pathways rather than waiting for implementation or administrative review.