Can I ask you how long it lasts when you get them?
30 minutes to an hour.
I get a ‘ring of light’ that starts in the center of my field of vision as a bright spot, and slowly gets larger and larger until it expands beyond my sight.
The first time it happened it scared me half to death........
I always carry my Sumatriptan with me and take one as soon as I start seeing/feeling the starburst patterns. It takes anywhere from 20 to 30 minutes to work. It works faster if I can go in a dark room and close my eyes for the 15-20 mins. The Sumatriptan recommends you take a second pill in one hour but I never do as it upsets my stomach. I should mention that I have a sensitive stomach and it may not have that affect on others.