Shit, angioedema reaction caused by ARB. This means you cannot use this class of medication or ACE inhibitors again. Make sure your pharmacy and family physician records have this reaction on file.
I'm surprised you didn't have a persistent dry cough for the last 8 months. Development of cough can predict future risk of angioedema. You hear about these things but never really expect to see it (incidence about 1 in 100,000). The reaction can happen after years and even decades of use.
Hope to get it out of my system. Woke up today with puffy eye lids.