Prostate cancer taking Olaparib can usually be effective in about 2~3 months of medication, but due to the different conditions of each person and their own constitution, the specific time of effectiveness varies from person to person. Olaparib is a poly ADP ribose polymerase inhibitor, which has been approved for advanced ovarian cancer, metastatic pancreatic cancer, metastatic breast cancer, metastatic desmoplasia-resistant prostate cancer and so on. Clinical trials have shown that clear efficacy can be observed after about 2~3 months of using this product, and long-term application can effectively improve patients’ symptoms and prolong their survival. Common adverse reactions of this drug include anemia, nausea, vomiting, nasopharyngitis, decreased appetite, fatigue, arthralgia, headache, etc. It is contraindicated for those who are allergic to this product, and breastfeeding should be discontinued during the period of treatment and within 1 month after the last dose. Please take the medication according to the doctor’s instructions and go to the hospital for regular checkups.