Successful olaparib desensitization using a novel one-day protocol.

To our knowledge, this is the first reported case of successful olaparib desensitization using a novel 1-day desensitization protocol, and will contribute to drug allergy knowledge, in an area where robust data is lacking. This case demonstrates the important role for drug desensitization in patients with immediate hypersensitivity reactions to chemotherapeutic agents. Furthermore, as olaparib capsules are being phased out in favour of olaparib tablets, we provide a clear case that transitioning from capsule to tablet form did not cause a loss of tolerance.