This decision isn't only ineffective but nonsensical. The "suspicious" prescriptions were for legal drugs written by licensed doctors. As pharmacies are just a link in a long chain that caused the opioid crisis, this won't help to tackle the epidemic - it will only make pharmacies reluctant to fill legitimate prescriptions.
Pharmacy chains are legally obliged to examine red-flag prescriptions, block them and alert the Drug Enforcement Agency. Walgreens failed to do this. The truth is that pharmacies have as much liability in the nationwide opioid epidemic as drug distributors and manufacturers. They've helped to engender it and failed to review their practices.