Ibyra 100 mg Tablets Ibyra 100 mg is an oral targeted anticancer medicine containing olaparib. It works by blocking PARP enzymes that help cells repair damaged DNA. Cancer cells with certain defects in their DNA-repair mechanisms can become more vulnerable to this treatment, which helps slow their growth and survival. Olaparib is used for selected ovarian, breast, pancreatic, and prostate cancers, depending on the patient's cancer type and genetic or biomarker status.