title: From the Food and Drug Administration.
authors.forename: S L
authors.initials: SL
authors.lastname: Nightingale
mesh_terms: D000480:Alkynes; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D048588:Benzoxazines; D003281:Contraceptives, Postcoital; D003521:Cyclopropanes; D017277:Drug Approval; D004997:Ethinyl Estradiol; D006801:Humans; D016912:Levonorgestrel; D010078:Oxazines / Q000627:therapeutic use*; D018894:Reverse Transcriptase Inhibitors / Q000627:therapeutic use*; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D000480:Alkynes; D019380:Anti-HIV Agents; D048588:Benzoxazines; D003281:Contraceptives, Postcoital; D003521:Cyclopropanes; D010078:Oxazines; D018894:Reverse Transcriptase Inhibitors; D004997:Ethinyl Estradiol; D016912:Levonorgestrel; C098320:efavirenz