We already do this for Zithromax Z-Pak, Imitrex, Diflucan, and Medrol DosePak where the directions and prescribed quantity are always the same. For other drugs

We already do this for Zithromax Z-Pak, Imitrex, Diflucan, and Medrol DosePak where the directions and prescribed quantity are always the same. For other drugs, in practice you get short supply on a drug, and can only fill a partial, or you have patients that only want a weeks worth. Another factor is the packaging adds extra cost, and it's cheaper to order a bulk 500 count bottle.