Ep. 193 - Are You Really Allergic? What Patients & Doctors Need to Know About Drug Reactions
Update: 2025-09-23
Description
Adverse drug reactions and allergic responses to medications and vaccines are no longer rare side effects—they’re a growing medical challenge. In this episode, we sit down with Dr. Mariana Castells, Professor of Medicine at Harvard Medical School, Director of the Mastocytosis Center of Excellence, and Director of the Drug Hypersensitivity and Desensitization Center at Brigham and Women’s Hospital.
We explore:
- Why newer medications and targeted therapies carry higher risks of severe reactions
- The difference between drug intolerance, adverse reactions, and true allergies
- The dangers of mislabeling penicillin allergy—and how it affects treatment choices
- Cutting-edge diagnostic tools like basophil and mast cell activation testing
- The role of mast cells, novel receptors, and genetics in multiple drug allergies
- Strategies for safer prescribing, testing, and desensitization
Whether you’re a clinician, researcher, or patient who’s experienced a “bad reaction” to medication, this conversation offers clarity on what we know today—and where the science of drug allergy is heading.
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