I have had migraines since my university days and I've suffered through them with as little medication as possible. I would usually just take painkillers and once in awhile I'd take migraine pills when it's really bad.
I took some yesterday and I noticed something quite unusual. I found that I could not remember the simplest of stuff, yesterday and today. I was in a few conversation with my boss and colleagues and I could not remember names and words.
I did some research and learnt that memory loss is one of the many side effects of migraine medication.
I think that is quite scary and I will now not take any until I really, really cannot stand the pain.