I have been taking Brabio 40 mg glatiramer acetate injections for almost 3 years now, I take them 3 times a week and I never had any strange reactions until recently. Since the start of the year, there have been 4 incidents where after I take the injection my chest starts to feel heavy, my breath is more shallow, I get flushed all over my face, neck, chest and arms, and I get really dizzy and it feels like I'm choking but I don't have any major difficulty breathing. One time I completely blacked out for a few seconds. This whole thing usually lasts only a few minutes but it’s always unexpected and doesn’t happen often. Has any one had a similar experience? I'm really confused because for the first 2 years of taking these injections I had no issues at all.