Wiktionary
a. 1 very allergic 2 very allergenic; hyperallergenic
Wikipedia
Hyperallergic is a Brooklyn-based arts blogazine. Founded by the art critic Hrag Vartanian and his husband Veken Gueyikian in October 2009, the site describes itself as a "forum for serious, playful, and radical thinking."
The New Yorker critic Peter Schjeldahl has described the site as "infectiously ill-tempered." Holland Cotter of the New York Times has also praised the site, crediting it with a revival in popular art criticism. The publication was cited by the TED blog as one of "100 Websites You Should Know and Use" in 2007.
Usage examples of "hyperallergic".
That was very fortuitous and it may also be significant if we assume that something in the fruit he consumed before the first fall caused the hyperallergic reaction following the flyer accident.
Our provisional diagnosis is that he suffers from a wide-ranging, hyperallergic reaction to all forms of medication used so far.