Lisinopril and fat cells

I have taken lisinopril for more than 4 years and 2 days ago my tongue started swelling. It was about 9:00 p.m. and we were getting ready to go to bed when I realized it was getting worse. My tongue filled my mouth and protruded out and I couldn't swallow and could only speak with garbled words. My husband took me to the emergency room where they very quickly diagnosed it as an allergic reaction to lisinopril. I ended up in intensive care for the night. This was a very frightening experience, as well as terribly uncomfortable (and expensive). I spoke to my pharmacist today and he takes lisinopril. I told him to do some research and check out alternatives. I'd be interested to know the percentage of people who have similar, severe reactions to this drug.