A nurse is teaching a class about pharmacodynamics.
The nurse should include that which of the following medication levels occurs when a medication is at the lowest serum concentration?
Toxic.
Peak.
Trough.
Half-life.
The Correct Answer is C
Choice A rationale
Toxic levels refer to concentrations of a medication that are high enough to cause harmful effects or poisoning. This is not related to the lowest serum concentration.
Choice B rationale
Peak levels are the highest concentration of a medication in the bloodstream after administration. This occurs after the drug is absorbed and distributed.
Choice C rationale
Trough levels occur when the medication is at its lowest concentration in the bloodstream, typically just before the next dose is due. Monitoring trough levels helps ensure therapeutic effectiveness while avoiding toxicity.
Choice D rationale
Half-life refers to the time it takes for the concentration of a drug in the bloodstream to decrease by half. It is not directly related to the lowest serum concentration at a specific point in time.
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Correct Answer is C
Explanation
Choice A rationale
Documenting the medication administration is important but should be done after administering the medication. Documentation ensures proper tracking and accountability but does
not address immediate patient safety concerns like checking for allergies.
Choice B rationale
Mixing the medication at the client's bedside may ensure that the medication is prepared correctly and the client receives it promptly, but it doesn't address the critical step of
ensuring the client's safety by checking for allergies first.
Choice C rationale
Checking the client for allergies is crucial before administering any medication, including powdered forms. Allergic reactions can be severe or life-threatening, so it’s essential to
ensure that the client isn’t allergic to the medication. This step ensures the safety and well-being of the client and prevents potential adverse reactions.
Choice D rationale
Determining the client's response to the medication is important for assessing the medication's effectiveness and identifying any adverse reactions, but it occurs after administration.
Checking for allergies precedes all these steps to prevent any initial harm.
Correct Answer is C
Explanation
Choice A rationale
Cheese is high in calcium, which can interfere with the absorption of iron by binding to it in the digestive tract, making it less available for absorption.
Choice B rationale
Antacids containing magnesium can interfere with the absorption of iron by increasing the pH of the stomach, reducing the solubility and absorption of iron.
Choice C rationale
Orange juice is high in vitamin C, which can enhance the absorption of iron by reducing it to a form that is more easily absorbed by the body.
Choice D rationale
Milk contains calcium, which can inhibit the absorption of iron. Calcium competes with iron for absorption in the intestines, leading to reduced iron absorption.