What are the side effects of zomig?

I am 42 years old and I am suffering from migraine for the past 1 year or so. My problem is that I am also a heart patient. I was taking ergotamine for tackling my migraine problem earlier but now my doctor is advising me to use zomig. I have no idea about this drug so I would like to know from you about the zomig side effects before I use it personally? Thanks!