This is not a medication that should be given to asthmatics. My ...

This is not a medication that should be given to asthmatics. My son was started on this medicine for frequent migraines, >2 per week. He has asthma and is very small for his age 100lbs. He was taking the smallest dose of 25mg per day. He only took the pill twice and was already having shortness of breath and beginnings of sinus infection and upper respiratory issues. I really don't think this medicine should be prescribed to anyone with asthma.