It’s at the pharmacists discretion to fill or not fill. It happens thousands of times every day, primarily for overprescribing meds. In fact, pharmacists are now being held personally responsible if they fill too many control drugs regardless if they are legitimately written. Pharmacist are the drug experts, physicians are health experts. Pharmacists follow the directives of their local state board, the FDA, and the DEA, not physicians. Most of the time, they work hand in hand with physicians. If the state board instructs a pharmacist to only fill prescriptions with a specific diagnosis, not following such directive puts that pharmacists license in jeopardy.