Patient Assistance Programs (P) We have compiled a list of pharmaceutical companies that sponsor patient assistance programs for the medically underserved and uninsured. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Perrigo Labs Person and Covey Pfizer, Inc. Primus Pharmaceuticals Procter & Gamble Pharmaceuticals Prometheus Laboratories, Inc. Purdue Pharma L. P.