HESI Pharmacology Practice Exam

Correct Answer B: Uric acid level

Explanation:

Busulfan (Myleran) is an alkylating agent used to treat conditions such as acute myelocytic leukemia. One of the significant adverse effects of busulfan is the potential for hyperuricemia, or an elevated uric acid level in the blood. Uric acid is a byproduct of purine metabolism, and chemotherapy agents like busulfan can cause the rapid destruction of cancer cells, releasing large amounts of purines. This leads to increased levels of uric acid, which may crystallize and deposit in the kidneys or joints, causing gout or renal damage (uric acid nephropathy). To avoid these complications, the nurse must closely monitor the client’s uric acid levels during treatment.

Uric acid levels can be controlled or prevented by administering medications such as allopurinol, which reduces uric acid production, or by encouraging hydration to help flush the uric acid from the body. Monitoring the uric acid level is essential to prevent these complications from occurring, as they can result in significant renal issues and painful joint inflammation.

Explanation of Incorrect Options:

A. Clotting time – Clotting time refers to the period it takes for blood to clot. While certain chemotherapy agents can affect blood clotting, busulfan is not specifically known to cause significant changes in clotting time. Therefore, this is not the primary laboratory value to monitor during busulfan treatment.

C. Potassium level – Potassium levels are typically monitored when chemotherapy agents have a direct effect on the kidneys or electrolyte balance, such as with cisplatin or certain diuretics. Busulfan, however, is not primarily associated with causing abnormal potassium levels.

D. Blood glucose level – Busulfan does not directly affect blood glucose levels in a way that would necessitate routine monitoring. While some chemotherapy agents may cause hyperglycemia due to stress or steroid use, this is not a concern specific to busulfan.

Summary:

The primary laboratory value to monitor during busulfan treatment is the uric acid level due to the risk of hyperuricemia, which can cause gout and renal complications. Correct answer: B. Uric acid level.

Correct Answer B. The client exhibits an excessive need to please and gain approval.

Explanation of Correct Answer:

B. The client exhibits an excessive need to please and gain approval.

A codependent relationship is characterized by an imbalance where one partner tends to prioritize the needs of the other person over their own. The client who exhibits an excessive need to please and gain approval is often trying to maintain a relationship at the cost of their own emotional well-being. This behavior reflects the hallmark traits of codependency, where the client may feel responsible for others’ happiness and neglect their own needs.

Why the Other Options Are Incorrect:

A. The client frequently expresses their own needs and desires.

This is not indicative of a codependent relationship. In a healthy relationship, it is important for individuals to express their own needs and desires. Codependency typically involves neglecting one's own needs to focus on another’s.

C. The client seeks support from friends and family outside of the relationship.

This is a healthy behavior and is not indicative of codependency. In a codependent relationship, the client may avoid seeking support from others and rely excessively on the partner for validation and support.

D. The client sets healthy boundaries and maintains a sense of self.

This is a sign of a healthy relationship, not codependency. Codependent individuals often lack healthy boundaries and may lose a sense of their own identity in the relationship. Setting boundaries and maintaining a sense of self are key elements of healthy emotional functioning.

Correct Answer A: Vitamin A

Explanation:

Isotretinoin is a retinoid (a form of Vitamin A) used to treat severe acne. Vitamin A supplementation, whether in the form of dietary supplements or topical products, increases the risk of toxicity when combined with isotretinoin. The combination of isotretinoin and Vitamin A can lead to hypervitaminosis A (Vitamin A toxicity), which can cause serious side effects such as liver damage, intracranial pressure increase, and bone or joint pain. Therefore, the nurse should contact the healthcare provider (HCP) if the client is taking Vitamin A in any form.

Explanation of Incorrect Options:

B. Digoxin (Lanoxin):

Digoxin is a medication used for heart conditions, and it does not have a direct interaction with isotretinoin. There is no known significant interaction between digoxin and isotretinoin that would require discontinuation or dose adjustment.

C. Furosemide (Lasix):

Furosemide is a diuretic used to treat fluid retention and hypertension. While it can affect electrolyte balance, it does not have a known contraindication with isotretinoin.

D. Phenytoin (Dilantin):

Phenytoin is an anticonvulsant used to manage seizures. While phenytoin can interact with many medications, no specific contraindications are identified with isotretinoin. However, caution is still necessary with polypharmacy, but it would not be a reason to contact the HCP unless a specific concern arises.

Summary:

If the client is taking Vitamin A (A), the nurse should contact the healthcare provider (HCP). Combining Vitamin A with isotretinoin can lead to Vitamin A toxicity, which can have serious health consequences. Therefore, careful monitoring is required, and isotretinoin should not be prescribed with additional Vitamin A.

Correct Answer B: Triglyceride level

Explanation:

Isotretinoin (commonly prescribed for severe acne) can have significant systemic side effects, including alterations in lipid metabolism. One of the key concerns is the potential for an increase in triglyceride levels, which can sometimes lead to pancreatitis if they become excessively elevated. Therefore, triglyceride level testing is required before starting isotretinoin and periodically throughout treatment to monitor for this potential adverse effect. Elevated triglycerides are a known side effect of isotretinoin and may require dose adjustments or discontinuation of the drug if levels become too high.

Explanation of Incorrect Options:

A. Platelet count:

While isotretinoin can affect various blood cell counts, it is not typically associated with significant changes in platelet count. Therefore, platelet count is not the primary lab test ordered before starting isotretinoin.

C. Complete blood count (CBC):

A CBC may be performed as part of general health monitoring, but triglyceride levels are more directly relevant to isotretinoin therapy, as the medication can lead to lipid disturbances.

D. White blood cell count:

Isotretinoin is not typically associated with significant effects on the white blood cell count. Although leukopenia may be a rare side effect, it is not the primary concern compared to triglyceride monitoring.

Summary:

Triglyceride level (B) is the correct laboratory test to monitor for potential lipid abnormalities and pancreatitis in clients prescribed isotretinoin for severe acne. While other blood tests like a complete blood count (C) or platelet count (A) might be monitored as part of routine care, triglyceride levels are specifically critical for assessing the safety of isotretinoin therapy.

Correct Answer B: 125 ml/hour

Explanation:

To calculate the flow rate in ml/hour for the intravenous infusion, use the formula:

Flow rate (ml/hour) = Total volume (ml) ÷ Time (hours)

Given:

Total volume = 1000 ml

Time = 8 hours

Step 1: Calculate the flow rate:

1000 ml ÷ 8 hours = 125 ml/hour

So, the nurse should program the infusion pump to deliver 125 ml/hour.

Explanation of Incorrect Options:

A. 100 ml/hour – This would infuse the solution too slowly over 8 hours, delivering only 800 ml, not the required 1000 ml.

C. 150 ml/hour – This would deliver 1200 ml in 8 hours, which exceeds the prescribed volume.

D. 200 ml/hour – This would deliver 1600 ml in 8 hours, which also exceeds the prescribed volume.

Summary:

The nurse should set the infusion pump to 125 ml/hour, which is B. 125 ml/hour.

Correct Answer A: Do you have any joint pain?

Explanation of Correct Answer:

Leflunomide (Arava) is an immunomodulatory drug primarily used to treat rheumatoid arthritis (RA) and psoriatic arthritis. It works by inhibiting pyrimidine synthesis, which reduces the activity of the immune system and helps to decrease inflammation, particularly in the joints. Therefore, joint pain is an important indicator of how well the medication is working. A reduction in joint pain or improvement in joint function would indicate that the medication is effectively managing the symptoms of arthritis.

Why the Other Options Are Incorrect:

B. Are you having any diarrhea?

Diarrhea is a possible side effect of leflunomide, but it is not a direct indicator of the medication's effectiveness. While monitoring for side effects is important, the primary measure of the drug's effectiveness is the improvement in the symptoms of rheumatoid arthritis, particularly joint pain and swelling, not gastrointestinal symptoms like diarrhea.

C. Do you have frequent headaches?

Headaches are not a specific or direct indicator of the effectiveness of leflunomide. While they can be a side effect of the medication, they are not typically used to assess the efficacy of the treatment in managing rheumatoid arthritis. The key therapeutic effect of leflunomide is to reduce joint inflammation and pain, not to relieve headaches.

D. Are you experiencing heartburn?

Heartburn is another potential side effect of leflunomide, but it does not reflect the drug's therapeutic effectiveness. Heartburn is not a symptom that would indicate whether leflunomide is working to treat rheumatoid arthritis or other autoimmune conditions.

Summary:

To assess the effectiveness of leflunomide (Arava), the nurse should focus on symptoms related to the primary condition being treated, such as joint pain in the case of rheumatoid arthritis. Other side effects like diarrhea, headaches, and heartburn, though important to monitor, do not directly reflect the medication's efficacy.

Correct Answer D: Human immunodeficiency virus (HIV) infection

Explanation of Correct Answer:

Lamivudine (Epivir) is an antiretroviral medication that is commonly used in the treatment of human immunodeficiency virus (HIV) infection. It works by inhibiting the reverse transcriptase enzyme, which is essential for the replication of the HIV virus. Lamivudine is often used in combination with other antiretroviral drugs as part of highly active antiretroviral therapy (HAART) to manage HIV infection and prevent progression to AIDS.

Why the Other Options Are Incorrect:

A. Pancreatitis

Lamivudine is not prescribed to treat pancreatitis. While pancreatitis may be a potential adverse effect of some medications, lamivudine itself is not a treatment for this condition. The management of pancreatitis typically involves supportive care and addressing the underlying cause.

B. Pharyngitis

Lamivudine is not prescribed for pharyngitis (sore throat), which is typically caused by viral or bacterial infections. Treatment for pharyngitis depends on the underlying cause (e.g., antibiotics for bacterial infections like streptococcal pharyngitis, supportive care for viral causes). Lamivudine is not effective for this condition.

C. Tonic-clonic seizures

Lamivudine is not used to treat tonic-clonic seizures. Seizures are typically managed with anticonvulsant medications, and lamivudine is not part of this therapeutic regimen. The treatment of seizures involves drugs like phenytoin, valproate, or levetiracetam, depending on the specific cause.

Summary:

Lamivudine (Epivir) is used to treat HIV infection by inhibiting the replication of the virus. It is not used to treat pancreatitis, pharyngitis, or tonic-clonic seizures.

Correct Answer C: Acetaminophen (Tylenol)

Explanation of the Correct Answer:

Lansoprazole (Prevacid) is a proton pump inhibitor (PPI) that works by reducing stomach acid production. A key consideration when advising clients taking PPIs is the potential for drug interactions, especially with medications that affect the gastrointestinal (GI) tract or that can exacerbate conditions related to acid production.

In this case, acetaminophen (Tylenol) is the most appropriate choice for headache relief in a client taking lansoprazole, as it does not irritate the stomach or increase gastric acid production, which is particularly important in conditions like Zollinger-Ellison syndrome (a condition that causes excessive gastric acid production). Acetaminophen is a mild analgesic and is generally safe for clients who need to avoid NSAIDs (nonsteroidal anti-inflammatory drugs) or aspirin due to their potential to irritate the stomach lining and increase the risk of ulcers.

Why the Other Options Are Incorrect:

A. Naprosyn (Aleve)

Naprosyn, a NSAID, can increase the risk of gastric irritation, ulceration, and bleeding, particularly in clients with a history of acid-related disorders or those taking PPIs. Since lansoprazole reduces stomach acid and protects against ulcer formation, using an NSAID like Naprosyn could counteract the protective effects and increase the risk of GI complications.

B. Ibuprofen (Advil)

Similar to naproxen, ibuprofen is also a NSAID and poses the same risks of gastric irritation, ulceration, and bleeding. It should be avoided in individuals with gastrointestinal conditions like Zollinger-Ellison syndrome or those taking proton pump inhibitors like lansoprazole.

D. Acetylsalicylic acid (aspirin)

Aspirin is another NSAID, and like ibuprofen and naproxen, it increases the risk of gastric irritation, ulcer formation, and bleeding. It is contraindicated for clients with gastric conditions, including Zollinger-Ellison syndrome, as it can exacerbate acid-related problems.

Summary:

The appropriate analgesic for a client taking lansoprazole for Zollinger-Ellison syndrome is acetaminophen (Tylenol), as it does not increase the risk of stomach irritation or bleeding. NSAIDs, including naproxen, ibuprofen, and aspirin, should be avoided due to their potential to worsen gastric irritation and exacerbate acid-related conditions.

Correct Answer C: Use of nitroglycerin

Explanation

The nurse should question the prescription of sildenafil (Viagra) if the client is concurrently using nitroglycerin or any nitrate medication. Sildenafil is a phosphodiesterase-5 (PDE5) inhibitor, which can cause vasodilation and a significant drop in blood pressure. When combined with nitrates, which are also vasodilators, the risk of severe, potentially life-threatening hypotension increases substantially. This combination is strictly contraindicated, and the nurse must alert the provider to avoid this dangerous interaction.

Why the Other Options Are Incorrect:

A. Neuralgia

Neuralgia (nerve pain) is not a contraindication to using sildenafil. While the cause of neuralgia should be assessed and managed, it does not pose a risk of interaction or adverse effects with sildenafil.

B. Insomnia

Insomnia is not a contraindication for sildenafil use. Although sildenafil can cause some mild side effects like flushing or headache, it does not typically worsen insomnia or interact negatively with it.

D. Use of multivitamins

Multivitamins have no known interaction with sildenafil and are commonly used by many clients. There is no reason to question sildenafil use based on concurrent multivitamin use.

Summary:

The nurse should question the use of sildenafil in clients taking nitroglycerin (C) due to the risk of profound hypotension from combined vasodilatory effects. Neuralgia (A), insomnia (B), and multivitamins (D) do not pose such risks and are not contraindications. Identifying and preventing drug interactions is critical for patient safety.