Immunotherapy Drugs: A Chance to Live Longer or Die from Myriad Side Effects


So-called immunotherapy drugs [e.g., Opdivo, Yervoy, Ketruda] have been hailed as a breakthrough in cancer treatment, attracting billions of research dollars and offering new hope to patients out of options. But as their use grows, doctors are finding that they pose serious risks that stem from the very thing that makes them effective.

A recent study found that 30 percent of patients experienced “interesting, rare or unexpected side effects,” with a quarter of the reactions described as severe, life-threatening or requiring hospitalization. Some patients have died, including five in recent months in clinical trials of a new immunotherapy drug being tested by Juno Therapeutics Inc.

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