Our pharmacists constantly review and revise our Preferred Drug List (PDL) to help ensure the most cost- and clinically effective medications are available to you with no co-pays. A new PDL is issued twice a year, in January and in June, so remember to check the most up-to-date version of the PDL online, before filling your prescriptions to be sure that they’re on our list of preferred drugs—and to avoid out-of-pocket costs. Please also remind your doctor or other healthcare provider to refer to the latest PDL whenever he or she is considering adding a prescription medication to your treatment.