From the Food and Drug Administration.
Nightingale
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D016907:Adverse Drug Reaction Reporting Systems; D002710:Chlorhexidine / Q000009:adverse effects*; D003195:Computer Communication Networks; D000075202:Contraindications; D004202:Disinfectants / Q000009:adverse effects*; D017277:Drug Approval; D004342:Drug Hypersensitivity / Q000209:etiology*; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D004864:Equipment and Supplies; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D014481:United States; D014486:United States Food and Drug Administration
D004202:Disinfectants; D004791:Enzyme Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D002710:Chlorhexidine