title: Preservative in fentanyl preparations.
mesh_terms: D004349:Drug Packaging; D005283:Fentanyl / Q000008:administration & dosage*; D010592:Pharmaceutic Aids; D011310:Preservatives, Pharmaceutical
chemical_list: D010592:Pharmaceutic Aids; D011310:Preservatives, Pharmaceutical; D005283:Fentanyl