I had severe headaches and was only on it for a month. They were caused by high blood pressure. Because they couldn’t get my blood pressure under control we decided to stop the Zejula. I was an unusual case so don’t go by me. I know others that did very good on it. Unfortunately everyone reacts differently. I was on Lynparza for several months after Zejula and had very little problems, it just stopped working and tumors had metastasized.