Hypersensitivity to prazosin.
D000368:Aged; D003875:Drug Eruptions / Q000209:etiology*; D004342:Drug Hypersensitivity / Q000209:etiology*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy; D011224:Prazosin / Q000009:adverse effects*; D011799:Quinazolines / Q000009:adverse effects*; D014581:Urticaria / Q000139:chemically induced*
D011799:Quinazolines; D011224:Prazosin