It is not uncommon for patients to change pharmacy benefit managers when changing health plans or for health plans to change their pharmacy benefit manager.  Physicians and patients get caught in the crossfire of endless forms and calls while waiting for meds, which they have successfully taken for years, are now questioned.  It is very difficult to reconstruct a person's previous med history when we have changed to a new EMR and then find it hard to justify to the PBM why the person ended up on the regimen that is working for them.  It is a waste of time and potentially dangerous.  These requests involve FDA-approved drugs and often generic medications.