I get the excruciating headaches as well from the IVIg treatments. They’re horrible. My last hospitalization neurology came to see me and gave me a steroid and something else concoction that actually worked. I will try to find out exactly what it was and share as this was a game changer for me. I’ve also been prescribed Ubrelvy which is a migraine medication. That helps to relieve the headache better than anything they’ve given me once you already have it. Before that, the only thing that gave me a few hours of relief was morphine. But they don’t like giving that.