It is not recommended to take olaparib if you are allergic to the active compound and other ingredients of the medicine. Speak with your doctor immediately if you experience breathlessness, chest pain, rapid heart rate, fever, cough, or wheezing. Your healthcare provider will conduct blood tests before and every month during the treatment, as this medicine could reduce the counts of RBC, WBC, and platelets. Tell your healthcare provider before starting treatment, if you have been diagnosed with problems in your lungs, liver, heart, or kidneys.