Hi Beth, I had Gamma surgery in 2019. I was taking CBD for fibromyalgia. The neurosurgeon told me to bring it with me. After the surgery, I had the headgear removed and was very queasy and had a bad headache. The nurse told me to take 1 cc of my CBD . It took care of the queasiness and dulled the headache. The nurse said to take it when or if I had the symptoms again. She said "you can't OD on CBD".
Good luck, Joan