The nurse is caring for a client who is 21-weeks pregnant and requires the administration of various medications. The nurse understands that different medications are classified on their potential interaction with the mother's fetus. From the list of options below, match the correct medication category to its corresponding description.

A. Category A:
Medications classified as Category A are considered the safest during pregnancy. They have been well-studied in pregnant humans, and no risk to the fetus has been demonstrated. This classification means that adequate and well-controlled studies have shown no evidence of harm to the fetus in the first trimester and no risk in later trimesters.

B. Category C:
Category C medications have shown potential risks to the fetus in animal studies, and there are no well-controlled studies in humans. The benefits of the medication may outweigh the potential risks, but caution is advised. These medications are used when the potential benefits justify the potential risks to the fetus.

C. Category X:
Category X medications are contraindicated in pregnancy due to evidence of fetal abnormalities or risks that outweigh any potential benefits. These medications have demonstrated clear evidence of harm to the fetus in both human and animal studies, and their use is not recommended during pregnancy.

D. Category B:
Category B medications have shown no risk to animal fetuses, but there is a lack of adequate and well-controlled studies in pregnant humans. The absence of evidence of harm in animal studies suggests that these drugs are generally considered safe, though their effects on human fetuses are not well-documented.

A. Chemical name:
The chemical name of a drug refers to its molecular structure and is often complex and technical, such as "2-(4-isobutylphenyl)propionic acid" for ibuprofen. This name is used primarily by chemists and is not typically used in clinical settings.

B. Generic name:
The generic name of a drug is its non-proprietary name, which is often simpler than the chemical name and is used universally to identify the drug regardless of the brand. For ibuprofen, the generic name is "ibuprofen." It is distinct from the brand name, which is a trademarked name used by manufacturers.

C. Nonproprietary name:
The term "nonproprietary name" is synonymous with the generic name. It refers to the drug's official, universally accepted name that is not associated with any specific brand. In this case, "ibuprofen" is the nonproprietary or generic name.

D. Brand name:
The brand name, also known as the trade name, is the name given by the manufacturer and is protected by trademark. "Motrin" is the brand name for ibuprofen. It is used in marketing and prescribing to differentiate it from other brands or generic forms of the same medication.