A patient is scheduled for diagnostic testing. Which medication should the nurse anticipate that the health-care provider would order?

A. Therapeutic level: This is the correct answer. It refers to the concentration of a drug in the bloodstream at which it achieves the desired effect without causing toxicity.

B. Therapeutic index: This is a ratio that compares the toxic dose to the therapeutic dose of a drug. It does not refer to the point of optimal effect.

C. Toxic level: This refers to the concentration of a drug at which it becomes harmful or toxic. It is not associated with the desired effect.

D. Therapeutic range: This refers to the range between the minimum effective concentration and the toxic concentration of a drug. It does not pinpoint the optimal effect but indicates the safe range.

A. Non-scheduled medication: OTC cough suppressants are typically classified as non-scheduled medications because they are not considered controlled substances and do not require a prescription for purchase.

B. Schedule III medication: Schedule III medications are controlled substances with a moderate potential for abuse and dependence. OTC cough suppressants do not fall under this category.

C. Schedule I medication: Schedule I medications are drugs with no accepted medical use and a high potential for abuse (e.g., heroin). OTC cough suppressants are not classified in this schedule.

D. Schedule V medication: Schedule V medications are controlled substances with a lower potential for abuse. While some cough medications containing codeine may be Schedule V, common OTC cough suppressants do not fall under this category unless they contain specific controlled substances.