The checkered history of Pfizer’s Premarin family of drugs

The drugs The name Premarin® spells out in its name what it is made from — PREgant MAres uRINe. Pfizer's Premarin® family of hormone replacement therapy drugs of today includes not only Premarin®, but also similarly manufactured pharmaceuticals — marketed at various times — under the names Prempro®, Premphase®, Provera® and later Aprela® (originally called…