title: Anaphylactic reaction to fentanyl or preservative.
mesh_terms: D000707:Anaphylaxis / Q000139:chemically induced*; D005260:Female; D005283:Fentanyl / Q000009:adverse effects*; D006801:Humans; D008875:Middle Aged; D010226:Parabens / Q000009:adverse effects*
chemical_list: D010226:Parabens; C015358:methylparaben; D005283:Fentanyl