In a frightening case out of British Columbia, a 76-year-old, otherwise healthy woman died when she was prescribed two drugs that were known to have dangerous interactions. According to a report by one local news source, the error slipped past the physician, two pharmacists, and the computer system that tracks drug interactions.
Evidently, the woman was on maintenance therapy for her colitis with a drug called mercaptopurine, an immunosuppressant. When the woman developed a case of gout, her prescribing doctor sent her to the pharmacy with a prescription for another drug. The two drugs were prescribed by the same doctor.
When she went to the pharmacy to fill her prescription for the new medication, no one at the pharmacy told her that the two drugs could be dangerous if taken together. The woman went home, continued taking her mercaptopurine, and started with the new drug as well.