Propylthiouracil and Purinethol Mix-Ups

The Institute for Safe Medication Practices (ISMP) is warning about mix-ups between the trade name of one drug and the generic name of another. Purinethol® (mercaptopurine), is the trade name of a potent antimetabolite used in oncology. Propylthiouracil is an anti-thyroid agent that only comes in generic form.