Final answer:
CDS II drugs may be prescribed orally to treat conditions within the GI tract, such as tapeworms with niclosamide or bowel decontamination with colistin. Poorly absorbed drugs often target specific areas like the intestinal tract or are used topically, such as bacitracin for skin infections.
Step-by-step explanation:
In the context of pharmacology, CDS II may stand for a category of drugs that could be prescribed orally under specific circumstances. Oral administration is favored because it allows patients to take their medication at home conveniently. However, certain drugs are not easily absorbed from the gastrointestinal (GI) tract into the bloodstream and are used with that characteristic in mind. For example, drugs like niclosamide, which are used to treat tapeworms, may be prescribed to act directly within the intestinal tract. Similarly, substances such as colistin may be used to decontaminate the bowel. Other drugs, which are poorly absorbed, like bacitracin, polymyxin, and some antifungals, are usually provided as topical preparations for treating superficial skin infections. Oral administration might not be an option for patients who are too ill to take medication by mouth, for instance, those experiencing severe vomiting or those who have been intubated and are on a respirator.