An acute urticarial reaction to piperazine citrate.
D006801:Humans; D010879:Piperazines / Q000009:adverse effects*; D014581:Urticaria / Q000209:etiology*
D010879:Piperazines; C006589:piperazine citrate
PIPERAZINES/injurious effects; URTICARIA/etiology and pathogenesis