In studies, people with a certain type of prostate cancer taking Zytiga (Abiraterone) delayed starting chemotherapy by about 8 months. Treats metastatic, castration-resistant prostate cancer (mCRPC). Zytiga (Abiraterone) is an oral tablet that's taken once a day.
Onslaught is a military term that refers to an attack against an enemy. It's safe to say that no one wants to be caught on the receiving end of an onslaught, because there will be lots of danger, destruction and probably death.
One way to help you remember the brutal meaning of onslaught is through the word's English origin, slaught, meaning slaughter. But onslaught can be used in non-military ways, too. It can mean a barrage of written or spoken communication, like an onslaught of emailed birthday wishes.