What term is used to describe the highest concentration of a drug in the blood after it is administered?
Peak level
Halflife
Trough level
Steady state
The Correct Answer is A
Choice A reason: Peak level is the correct term to describe the highest concentration of a drug in the blood after it is administered. Peak level is also known as peak plasma concentration or Cmax, and it reflects the rate and extent of drug absorption. Peak level is influenced by factors such as the route of administration, the dose, the formulation, and the bioavailability of the drug. Peak level is important to monitor for drugs that have a narrow therapeutic range, meaning that there is a small difference between the effective and toxic doses. The nurse should measure the peak level at the appropriate time after the drug administration, and adjust the dose or the frequency as needed to achieve the desired therapeutic effect and avoid adverse effects .
Choice B reason: Halflife is not the correct term to describe the highest concentration of a drug in the blood after it is administered. Halflife is the time it takes for the concentration of a drug in the blood to decrease by 50%. Halflife reflects the rate of drug elimination, which depends on factors such as the metabolism and excretion of the drug. Halflife is important to determine the dosing interval and the time to reach steady state. The nurse should consider the halflife of the drug when prescribing or administering the drug, and avoid drug accumulation or subtherapeutic levels .
Choice C reason: Trough level is not the correct term to describe the highest concentration of a drug in the blood after it is administered. Trough level is the lowest concentration of a drug in the blood before the next dose is given. Trough level reflects the balance between drug absorption and elimination, and it indicates the minimum effective concentration of the drug. Trough level is important to monitor for drugs that have a narrow therapeutic range, meaning that there is a small difference between the effective and toxic doses. The nurse should measure the trough level just before the next dose of the drug, and adjust the dose or the frequency as needed to achieve the desired therapeutic effect and avoid adverse effects .
Choice D reason: Steady state is not the correct term to describe the highest concentration of a drug in the blood after it is administered. Steady state is the condition when the rate of drug administration is equal to the rate of drug elimination, and the concentration of the drug in the blood remains constant. Steady state is usually reached after four to five halflives of the drug, and it reflects the optimal therapeutic level of the drug. Steady state is important to maintain for drugs that have a long halflife or a narrow therapeutic range, meaning that there is a small difference between the effective and toxic doses. The nurse should ensure that the drug is administered at regular intervals and at the appropriate dose to achieve and maintain steady state.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: This is incorrect. Taking an antacid with another antacid is redundant and unnecessary. Antacids are medicines that neutralize the acid in the stomach and relieve symptoms of heartburn, indigestion, and gastric ulcers. Taking too much antacid can cause side effects such as diarrhea, constipation, or electrolyte imbalance¹.
Choice B reason: This is incorrect. Taking an antacid as needed to reduce pain is not a good practice. Antacids are not painkillers and do not address the underlying cause of gastric ulcers. Gastric ulcers are sores in the lining of the stomach that can be caused by infection, inflammation, or erosion. Taking an antacid may temporarily relieve the pain, but it does not heal the ulcer or prevent complications. Antacids should be taken regularly as prescribed by the doctor, along with other medicines that treat the cause of the ulcer.
Choice C reason: This is correct. Taking an antacid after taking a proton pump inhibitor (PPI) is a good practice. PPIs are medicines that reduce the production of acid in the stomach and help heal gastric ulcers. However, PPIs may take several hours to work and may not provide immediate relief of symptoms. Taking an antacid after a PPI can help neutralize any remaining acid in the stomach and provide faster symptom relief. However, the antacid should be taken at least 2 hours after the PPI, as the antacid can interfere with the absorption of the PPI.
Choice D reason: This is incorrect. Reducing fluid intake with an antacid is not a good practice. Fluid intake is important for hydration, digestion, and elimination. Reducing fluid intake can cause dehydration, constipation, or kidney problems. Fluid intake does not affect the effectiveness of antacids, as long as the antacid is taken with a glass of water to help dissolve and flush it down the esophagus and into the stomach.
Correct Answer is D
Explanation
Choice A reason: Allergy is an immune mediated reaction to a substance that causes symptoms such as rash, itching, swelling, or anaphylaxis. It is not related to the duration or effectiveness of the medication. The patient does not report any signs of allergy to the opioids.
Choice B reason: Addiction is a chronic and compulsive disorder that involves seeking and using a substance despite harmful consequences. It is characterized by loss of control, craving, and impaired functioning. The patient does not show any signs of addiction to the opioids, such as increasing the dose, obtaining the medication illegally, or neglecting other responsibilities.
Choice C reason: Withdrawal is a syndrome that occurs when a substance is abruptly discontinued or reduced after prolonged use. It causes physical and psychological symptoms such as anxiety, agitation, sweating, nausea, or tremors. The patient does not experience any signs of withdrawal from the opioids, as they are still taking the medication as prescribed.
Choice D reason: Tolerance is a phenomenon that occurs when a substance loses its effectiveness over time due to repeated exposure. It requires higher doses or more frequent administration to achieve the same effect. The patient reports a sign of tolerance to the opioids, as they feel that the medication does not work as well anymore. The nurse should assess the patient's pain level, monitor the opioid dose, and consult with the prescriber about possible adjustments or alternatives.
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