title: Allergic reaction during double-contrast upper GI series.
mesh_terms: D001466:Barium Sulfate / Q000009:adverse effects*; D003287:Contrast Media / Q000009:adverse effects*; D004342:Drug Hypersensitivity / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate