Coenzyme Q10 for migraine prevention

Does anyone have experience on using coenzyme Q10 (ubiquinol, ubiquinone) to prevent migraine-type headache? My spouse has used it for maybe a year now. Her experience is that the headaches have not disappeared totally, but they are milder, and respond well to ordinary painkillers like paracetamol.

That was my experience. Milder but not gone. I was on 300 mg a day for about 3 years and recently changed to 200 mg a day. I will reduce down eventually to 1 a day to see if any changes.