HESI Pharmacology IV Exam

Correct Answer C: Hypokalemia, hyperglycemia, sulfa allergy

Explanation of the Correct Answer:

C. Hypokalemia, hyperglycemia, sulfa allergy

Hydrochlorothiazide (HydroDIURIL) is a thiazide diuretic, commonly used to treat conditions such as hypertension and edema. The primary concerns related to this medication include:

Hypokalemia: Thiazide diuretics like hydrochlorothiazide increase the excretion of potassium in the urine, which can lead to low potassium levels (hypokalemia). This can cause symptoms such as muscle weakness, cramping, and arrhythmias.

Hyperglycemia: Hydrochlorothiazide can also impair glucose metabolism, leading to elevated blood sugar levels (hyperglycemia), which is particularly concerning for patients with diabetes or those at risk for diabetes.

Sulfa allergy: Hydrochlorothiazide is a sulfonamide-based drug, and patients with a sulfa allergy may experience hypersensitivity reactions, such as rashes, fever, or even more severe reactions like Stevens-Johnson syndrome.

Why the Other Options Are Incorrect:

A. Hypouricemia, hyperkalemia

Hypouricemia (low uric acid levels) is not typically a concern with hydrochlorothiazide. Instead, thiazide diuretics can cause hyperuricemia, which may increase the risk of gout attacks.

Hyperkalemia (high potassium levels) is also not commonly associated with thiazide diuretics. In fact, thiazide diuretics are more likely to cause hypokalemia due to potassium excretion.

B. Increased risk of osteoporosis

While chronic use of thiazide diuretics may slightly reduce calcium excretion, leading to a small protective effect on bone density, osteoporosis is not a significant concern associated with hydrochlorothiazide. This is not one of the primary risks.

D. Hyperkalemia, hypoglycemia, penicillin allergy

Hyperkalemia is not associated with hydrochlorothiazide, as it tends to cause hypokalemia instead.

Hypoglycemia is not typically caused by hydrochlorothiazide. However, hyperglycemia is a concern (as mentioned above).

A penicillin allergy is not directly relevant to hydrochlorothiazide therapy, as this is unrelated to sulfonamide-based drugs.

Summary:

The primary concerns when administering hydrochlorothiazide (HydroDIURIL) are hypokalemia, hyperglycemia, and the possibility of a sulfa allergy. Regular monitoring of potassium levels and blood glucose is essential to prevent complications in patients on thiazide diuretics.

Correct Answer C: Monitor for signs of bleeding

Explanation of the Correct Answer:

C. Monitor for signs of bleeding

The priority nursing intervention for a client receiving tissue plasminogen activator (alteplase, Activase) is to monitor for signs of bleeding. Alteplase is a thrombolytic medication that works by dissolving blood clots, which is beneficial in the treatment of an acute myocardial infarction (MI). However, because alteplase increases the risk of bleeding (especially internal bleeding), it is essential for the nurse to closely monitor the client for any signs of bleeding such as hematuria, hematemesis, or ecchymosis. Early detection and intervention are crucial to prevent severe complications.

Why the Other Options Are Incorrect:

A. Monitor for renal failure

Although renal failure is a potential complication of various medications and conditions, renal failure is not the primary concern with alteplase. The primary risk with thrombolytic therapy is bleeding, not renal dysfunction, unless there is significant blood loss leading to hypoperfusion to the kidneys.

B. Monitor psychosocial status

While psychosocial status is important in the overall care of a patient, it is not the immediate priority when the client is receiving alteplase for an acute myocardial infarction. The most pressing concern is the risk of bleeding, as thrombolytics can cause significant complications if not monitored appropriately.

D. Have heparin sodium available

Although heparin sodium may be prescribed to prevent re-thrombosis after thrombolytic therapy, having heparin on hand is not the priority nursing intervention. The immediate concern is bleeding, and the nurse should focus on closely monitoring for bleeding signs before administering other medications like heparin. Heparin use is typically addressed after evaluating the risk of bleeding.

Summary:

The most critical priority for a client receiving alteplase (Activase) for an acute myocardial infarction is to monitor for signs of bleeding (Option C). Because alteplase is a thrombolytic agent that increases the risk of bleeding, vigilant monitoring for any evidence of hemorrhage is essential to prevent life-threatening complications. Monitoring for renal failure, psychosocial status, and having heparin available are also important, but bleeding remains the most urgent concern.

Correct answer A: It facilitates the transport of glucose into the cells.

Explanation of the correct answer:

A. It facilitates the transport of glucose into the cells.

Neutral protamine Hagedorn (NPH) insulin is an intermediate-acting insulin that works by lowering blood glucose levels by facilitating the transport of glucose into the cells. NPH insulin is absorbed more slowly and has a longer duration of action compared to short-acting insulins, and its primary action is to mimic the pancreas' ability to regulate glucose in the body. When administered, NPH insulin helps the body use glucose for energy by facilitating the entry of glucose into muscle and fat cells, which is essential for energy production.

Why the other options are incorrect:

B. It stimulates the function of beta cells in the pancreas.

NPH insulin does not stimulate the pancreas' beta cells. The pancreas' beta cells are responsible for producing insulin, but NPH insulin is an external source of insulin that works independently of the pancreas to help regulate blood glucose levels. It does not have a direct effect on the function of beta cells.

C. It increases the intracellular receptor site sensitivity.

NPH insulin does not directly increase receptor site sensitivity. It works by promoting glucose uptake into the cells. Sensitivity of insulin receptors is typically influenced by factors such as exercise and weight management, rather than the type of insulin being used.

D. It delays the carbohydrate digestion and absorption.

NPH insulin does not affect carbohydrate digestion or absorption. Its action is focused on facilitating glucose transport into cells. Medications like alpha-glucosidase inhibitors (e.g., acarbose) are used to delay the digestion and absorption of carbohydrates, but NPH insulin does not have this effect.

Summary:

NPH insulin helps to facilitate the transport of glucose into cells to lower blood sugar levels, which is crucial for managing Type 1 diabetes. Therefore, the statement "It facilitates the transport of glucose into the cells" indicates the correct understanding of how NPH insulin works.

Correct Answer A: Pancreatitis

Explanation of the Correct Answer:

A. Pancreatitis is correct because asparaginase (Elspar), an antineoplastic agent, is known to have pancreatic toxicity as a potential side effect. The medication can cause acute pancreatitis, which is an inflammation of the pancreas that may result in abdominal pain, nausea, vomiting, and other related symptoms. If a client has a history of pancreatitis, the nurse must consult with the registered nurse and likely the healthcare provider before proceeding with asparaginase treatment. Monitoring for signs of pancreatitis and performing baseline and ongoing assessments of the client's pancreatic function would be essential to prevent complications.

Why the other options are incorrect:

B. Diabetes mellitus is incorrect because although asparaginase may affect blood glucose levels by causing hyperglycemia, it is not a contraindication for administration in a client with diabetes mellitus. Clients with diabetes receiving asparaginase can be managed with adjustments to their insulin regimen or oral hypoglycemic agents. The key consideration would be monitoring the client’s blood glucose levels and adjusting treatment accordingly.

C. Myocardial infarction is incorrect because there is no direct contraindication or significant risk for administering asparaginase to clients with a history of myocardial infarction. While chemotherapy agents can affect the cardiovascular system, asparaginase is not specifically associated with cardiac complications like myocardial infarction, making this history less concerning for this medication.

D. Chronic obstructive pulmonary disease (COPD) is incorrect because COPD is not a contraindication for asparaginase administration. Although the medication may affect general organ function, COPD does not specifically interact with asparaginase in a way that would prevent its use. The focus would be on monitoring for respiratory effects, but it is not an absolute contraindication.

Summary:

The nurse should consult with the registered nurse before administering asparaginase if the client has a history of pancreatitis, as the medication is associated with pancreatic toxicity and can lead to acute pancreatitis. Clients with diabetes mellitus, myocardial infarction, or chronic obstructive pulmonary disease (COPD) can still receive asparaginase, but adjustments or additional monitoring might be necessary for diabetes mellitus to manage hyperglycemia.

Correct Answer C: The medications will kill the bacteria and stop the acid production.

Explanation of the Correct Answer:

C. The medications will kill the bacteria and stop the acid production." is correct because the prescribed regimen of clarithromycin (Biaxin), esomeprazole (Nexium), and amoxicillin (Amoxil) is a triple therapy commonly used to treat Helicobacter pylori infections in the treatment of peptic ulcers.

Clarithromycin and amoxicillin are antibiotics that work to kill the H. pylori bacteria, which is the underlying cause of the infection.

Esomeprazole, a proton pump inhibitor (PPI), works by reducing gastric acid production, which helps heal the ulcer and creates an environment less conducive to bacterial growth. This combination of medications addresses both the bacterial infection and the excessive acid production, leading to healing of the ulcer.

Why the other options are incorrect:

A. My ulcer will heal because these medications will kill the bacteria.

This statement is partially correct because the antibiotics do kill the bacteria, but it overlooks the important role of esomeprazole in reducing acid production, which is essential for healing the ulcer. The ulcer would not heal properly if acid production is not controlled.

B. These medications are only taken when I have pain from my ulcer.

This statement is incorrect because the medications in the regimen are meant to be taken regularly as prescribed, not on an as-needed basis. The antibiotics and PPI work best when taken consistently, and stopping them after pain resolves can result in incomplete treatment of the H. pylori infection, leading to potential recurrence.

D. The medications will coat the ulcer and decrease the acid production in my stomach.

 This statement is incorrect because none of the medications in the prescribed regimen (clarithromycin, amoxicillin, or esomeprazole) coat the ulcer. Esomeprazole reduces acid production, but it does not coat the ulcer. The ulcer healing is more related to reducing acid production and eliminating the bacteria.

Summary:

The correct statement reflects the dual action of the prescribed regimen for treating the Helicobacter pylori infection: it addresses the bacterial infection with antibiotics (clarithromycin and amoxicillin) and controls gastric acid production with esomeprazole, allowing the ulcer to heal.

Correct answer D: Complete blood count

Explanation of the correct answer:

D. Complete blood count (CBC)

Zidovudine (Retrovir, AZT) is an antiretroviral medication used to treat HIV/AIDS. A known adverse effect of zidovudine is bone marrow suppression, which can lead to anemia, leukopenia, and thrombocytopenia. These blood-related issues make it essential to monitor the complete blood count (CBC) regularly during treatment. The CBC will help identify any changes in white blood cells, red blood cells, or platelets, which are crucial for detecting early signs of bone marrow suppression and adjusting therapy if necessary.

Why the other options are incorrect:

A. Blood culture

Blood cultures are used to detect infections, not to monitor the direct effects of zidovudine. While infection risk may be increased in immunocompromised clients, it is not the primary focus during zidovudine therapy.

B. Blood glucose level

Although zidovudine can cause some metabolic side effects, including insulin resistance, monitoring blood glucose levels is not the most critical concern compared to blood cell counts. The CBC is the primary lab value to watch for potential hematologic side effects.

C. Blood urea nitrogen (BUN)

BUN is typically used to assess kidney function, and while some medications can affect renal function, zidovudine does not commonly cause kidney problems directly. Therefore, BUN is not the primary value to monitor in a client receiving zidovudine.

Summary:

The nurse should primarily monitor the complete blood count (CBC) in clients receiving zidovudine due to the risk of bone marrow suppression. This helps detect early signs of anemia, leukopenia, or thrombocytopenia, which may require adjustments in therapy.

Correct Answer D: Nausea and vomiting

Explanation of the Correct Answer:

D. Nausea and vomiting is correct because ondansetron (Zofran) is an antiemetic medication commonly used to prevent and treat nausea and vomiting caused by various factors, including postoperative recovery, chemotherapy, and radiation therapy. After surgery, many patients experience nausea and vomiting due to anesthesia, pain medications, or the stress of the procedure, making ondansetron an appropriate choice to manage these symptoms.

Why the other options are incorrect:

A. Paralytic ileus is incorrect because ondansetron is not used to treat paralytic ileus, a condition characterized by the lack of movement in the intestines leading to a functional obstruction. Treatment for paralytic ileus generally involves supportive care like fluid balance, electrolyte correction, and bowel rest. Ondansetron does not address the underlying issue of intestinal motility in paralytic ileus.

B. Incisional pain is incorrect because ondansetron does not treat pain. Pain management after surgery typically involves analgesics such as opioids or NSAIDs. Ondansetron specifically targets nausea and vomiting, not pain.

C. Urinary retention is incorrect because ondansetron is not used for treating urinary retention, which refers to difficulty emptying the bladder. Urinary retention is typically managed with interventions such as catheterization or medications to improve bladder tone, but not with ondansetron.

Summary:

Ondansetron (Zofran) is used to treat and prevent nausea and vomiting, particularly in the postoperative period where these symptoms are common due to surgery and anesthesia. It is not effective for managing paralytic ileus, incisional pain, or urinary retention, making it specifically useful for nausea and vomiting after surgery.

Correct answer A: Tinnitus and hearing loss.

Explanation of the correct answer:

Tinnitus (ringing in the ears) and hearing loss are classic signs of acute salicylate toxicity, which can occur after the ingestion of large amounts of aspirin or other salicylates. Salicylates, including aspirin, have ototoxic properties, meaning they can cause damage to the auditory system. These symptoms typically appear early in toxicity and are used to assess whether a client may be experiencing an overdose or toxic reaction. Tinnitus is often the first indication of toxicity and can progress to hearing loss if the toxicity is not addressed promptly.

Why the other options are incorrect:

B. Photosensitivity and nervousness:

These symptoms are generally not associated with salicylate toxicity. While certain medications or conditions may cause photosensitivity and nervousness, they are not characteristic signs of salicylate intoxication.

C. Acute gastrointestinal bleeding and anorexia:

While gastrointestinal bleeding can be a complication of chronic salicylate use (due to the irritant effect of salicylates on the gastric mucosa), acute gastrointestinal bleeding is more often associated with acute overdose. Anorexia may also occur in chronic intoxication, but these are not the hallmark symptoms of salicylate poisoning.

D. Hyperventilation and central nervous system effects:

Although hyperventilation and central nervous system effects (e.g., confusion, lethargy) are observed in chronic salicylate toxicity, tinnitus and hearing loss are more characteristic of acute salicylate poisoning.

Summary:

Tinnitus and hearing loss are hallmark signs of acute salicylate toxicity, making them the key symptoms to monitor for in cases of suspected overdose. This toxicity is caused by the ototoxic effects of salicylates on the auditory system. Chronic salicylate toxicity, on the other hand, is more associated with metabolic and neurological disturbances like hyperventilation and central nervous system effects.

Correct Answer B: 0.5 to 2 ng/mL

Explanation of the Correct Answer:

B. 0.5 to 2 ng/mL

The therapeutic serum digoxin level range is 0.5 to 2 ng/mL. Digoxin has a narrow therapeutic range, and monitoring blood levels is essential to ensure the drug is effective without causing toxicity. The serum level outside of this range, especially higher levels, increases the risk for digoxin toxicity, which can be life-threatening.

Why the Other Options Are Incorrect:

A. 3 to 5 ng/mL

This range is above the therapeutic range for digoxin and suggests toxicity. Levels higher than 2 ng/mL are considered too high and increase the risk of toxicity, particularly when combined with factors like hypokalemia.

C. 1.2 to 2.8 ng/mL

Although the upper part of this range (2.8 ng/mL) is close to the therapeutic range, the 1.2 to 2.8 ng/mL range is too broad and slightly exceeds the ideal therapeutic range for digoxin, which is considered 0.5 to 2 ng/mL.

D. 3.5 to 5.5 ng/mL

This range is well above the therapeutic range for digoxin and indicates toxicity. Digoxin toxicity can result in serious effects such as arrhythmias, anorexia, nausea, vomiting, and visual disturbances.

Summary:

The therapeutic serum level for digoxin is 0.5 to 2 ng/mL. Levels above this range increase the risk of digoxin toxicity, which is a serious concern. The nurse should be vigilant in monitoring digoxin levels and serum potassium levels, as hypokalemia can predispose a client to digoxin toxicity.