A nurse is providing an in-service regarding gastrointestinal (GI) medications. Complete the following sentences with the appropriate responses. Surfactant laxatives, such as dropdown ( Docusate sodium, bisacodyl, Polyethylene glycol), lower surface tension of the stool to allow penetration of water. This softens the stool so it can be passed more easily. On the other hand, dropdown ( Metronidazole, morphine, Loperamide) is used to prevent diarrhea.