RN Pharmacology BSN 315

Correct Answers:

Runny or stuffy nose,

Nausea

Headache.

 Runny or stuffy nose 

This is a common side effect of Januvia. Dipeptidyl peptidase-4 (DPP-4) inhibitors can cause mild upper respiratory infections, leading to nasal congestion or cold-like symptoms. Patients may experience sneezing, nasal irritation, or mild sinus discomfort.

Nausea 

Some patients taking Januvia may experience nausea, especially when first starting the medication. This occurs due to the medication's effects on digestion and the body's adaptation to changes in blood sugar regulation. The nausea is usually mild and improves over time.

Headache 

Headaches are a known side effect of Januvia. This may be due to fluctuations in blood sugar levels or the body’s response to the medication. Patients should be advised to stay hydrated and report persistent headaches to their healthcare provider.

Explanation of Incorrect Answers:

Increased blood glucose 

Januvia is designed to lower blood glucose levels, not raise them. It enhances insulin secretion and reduces glucagon release, both of which help control blood sugar levels. If a patient experiences increased blood glucose while taking Januvia, it may be due to other factors such as diet, nonadherence, or insulin resistance rather than the drug itself.

Increased appetite

Unlike other diabetes medications such as sulfonylureas, which stimulate insulin secretion and can lead to hunger, Januvia does not have a direct effect on appetite regulation. It primarily works by prolonging incretin hormone activity, which does not typically cause an increase in appetite.

Summary:

Januvia (sitagliptin) is a DPP-4 inhibitor used to manage type 2 diabetes by improving insulin secretion and reducing glucagon levels. The most common side effects include runny or stuffy nose, nausea, and headache. The medication does not cause increased blood glucose or increased appetite, making these options incorrect. Nurses should educate patients about possible side effects and monitor for any concerning symptoms.

Correct Answer: Inspect the client's oral mucosa for ulcerations.

Explanation:

Cytosine arabinoside (Arc-C) is known to cause oral mucositis (ulcerations or sores in the mouth), which is a common side effect of many chemotherapy drugs, including antimetabolites. Oral mucositis can lead to significant pain, difficulty eating, and risk of infection. Therefore, regular inspection of the oral mucosa for signs of ulcerations is a critical nursing intervention to help manage symptoms and prevent complications. Early detection allows for appropriate interventions, such as pain management and oral care, to reduce the severity of mucositis.

Why Other Options Are Incorrect:

Hydrate the client with IV fluids before and after infusion: While hydration is important in chemotherapy administration to prevent renal complications and ensure proper elimination of the drug, oral mucositis is a more immediate and common concern with cytosine arabinoside. Hydration can help with renal function, but addressing mucositis is a higher priority in the context of this specific medication.

Assess the client for numbness and tingling of extremities: Numbness and tingling (peripheral neuropathy) are typically associated with other chemotherapy agents, like platinum-based drugs (e.g., cisplatin). Cytosine arabinoside does not commonly cause neurological symptoms like neuropathy, so this is not a key nursing intervention for this specific medication.

Monitor the client's urine pH for increased acidity: While monitoring urine pH is important in the case of some chemotherapy drugs, cytosine arabinoside does not typically lead to problems with urinary pH. The renal toxicity risk with cytosine arabinoside is generally not related to urinary acidity, making this less of a priority than assessing for mucositis.

Summary:

Oral mucositis is a common and significant side effect of cytosine arabinoside therapy, and early detection and intervention are crucial. Therefore, inspecting the client's oral mucosa for ulcerations is the most important nursing intervention. While other aspects of care, such as hydration and monitoring for other side effects, are important, mucosal inspection takes precedence in this scenario.

Correct Answer: Give a PRN prescription for benztropine.

Explanation 

This is correct because the client is exhibiting a potential extrapyramidal symptom (EPS) known as dystonia or muscle stiffness, which is a common side effect of antipsychotic medications, especially typical (first-generation) antipsychotics. Continual rubbing of the neck can indicate muscle tightness, spasms, or discomfort, which may progress to more severe dystonic reactions such as torticollis (twisting of the neck) or even laryngospasm (which can impair breathing). Benztropine is an anticholinergic medication that is commonly prescribed PRN (as needed) to manage EPS by restoring the balance between dopamine and acetylcholine in the brain. Early administration of benztropine can relieve symptoms and prevent worsening of the dystonic reaction.

Why the Other Options Are Incorrect:

Obtain an extra pillow for the client to use at night.

This is incorrect because an extra pillow does not address the underlying cause of the neck discomfort, which is likely related to EPS from the antipsychotic medication. Providing comfort measures like a pillow is not harmful, but it is insufficient for treating muscle dystonia.

Obtain a prescription for physical therapy services.

This is incorrect because physical therapy is not appropriate or effective for managing acute dystonic reactions caused by antipsychotic medications. The problem is neurological and related to medication side effects, not physical injury or deconditioning.

 Provide the client a heating pad to place on the neck.

This is incorrect because, like the pillow, a heating pad might provide temporary local comfort but does nothing to correct the chemical imbalance causing the muscle stiffness or spasms. Also, heat therapy can be risky in clients with impaired sensation or cognitive issues.

Summary:

The client’s rubbing of the neck suggests early signs of an extrapyramidal side effect from antipsychotic therapy, specifically dystonia. The best intervention is to administer benztropine PRN, which directly treats the cause of the symptoms by counteracting the medication-induced imbalance of neurotransmitters. Comfort measures like pillows or heating pads are inadequate, and physical therapy is not indicated.

Correct Answer: Dopamine in the central nervous system is increased.

Explanation

Dopamine in the central nervous system is increased is correct because amantadine (Symmetrel) is a medication that helps to increase the availability of dopamine in the central nervous system (CNS). Parkinsonism, including Parkinson's disease, is primarily caused by dopamine deficiency in the brain, particularly in the basal ganglia, which controls movement and coordination. Amantadine works by several mechanisms that support dopamine function, including:

Increasing the release of dopamine.

Blocking dopamine reuptake, which helps dopamine stay active in the brain longer.

Possibly exerting anticholinergic effects, which help reduce motor symptoms like tremors and stiffness.

For clients with mild symptoms of Parkinsonism, amantadine can improve muscle control and reduce symptoms such as tremors, rigidity, and bradykinesia (slowness of movement) by enhancing dopamine's effect in the CNS.

Why the Other Options Are Wrong:

Viral organisms that cause Parkinsonism are eliminated is incorrect.

Although amantadine was originally developed as an antiviral medication for treating influenza A, its use in Parkinsonism is unrelated to viral activity. Parkinson's disease is not caused by viruses, and amantadine's benefit in this context is due to its effects on dopamine, not viral elimination.

Acetylcholine in the myoneural junction is enhanced is incorrect.

Parkinsonism involves an imbalance between dopamine and acetylcholine in the brain, with dopamine being too low and acetylcholine relatively too high. Increasing acetylcholine would actually worsen symptoms, not help them. The myoneural junction refers to the connection between nerves and muscles in the peripheral nervous system, and acetylcholine acts there to trigger muscle contractions. Amantadine does not work by increasing acetylcholine anywhere, and this is not its mechanism in Parkinsonism.

Norepinephrine release is reduced within the periphery is incorrect.

Amantadine does not primarily affect norepinephrine in the peripheral nervous system. Reducing norepinephrine release would affect things like blood pressure and heart rate but is not how amantadine works in Parkinsonism. Its therapeutic effect is centered on enhancing dopamine in the central nervous system, not on altering norepinephrine levels.

Summary:

The correct answer is Dopamine in the central nervous system is increased because amantadine helps improve symptoms of Parkinsonism by boosting dopamine activity in the brain. The other options are incorrect because amantadine's effect in Parkinsonism has nothing to do with eliminating viruses, increasing acetylcholine, or reducing norepinephrine. Understanding that Parkinson’s disease stems from dopamine deficiency is key to recognizing why increasing dopamine is the goal of treatment

Correct Answer: Protamine sulfate

Explanation of the correct answer:

Protamine sulfate is the antidote for heparin overdose and is used to reverse the anticoagulant effects of heparin. When a client receiving IV heparin develops hemorrhaging, as described in this scenario, protamine sulfate is administered to neutralize heparin's effect and prevent further bleeding. Protamine works by binding to heparin, forming a stable complex that inactivates its anticoagulant properties.

Why the other options are incorrect:

Vitamin K1 (AquaMEPHYTON)

This is the antidote for warfarin (Coumadin) overdose, not heparin. Vitamin K reverses warfarin's effect by helping the liver produce clotting factors, but it has no effect on heparin.

Warfarin sodium (Coumadin)

Warfarin is another anticoagulant, not an antidote. Giving warfarin to a bleeding patient would worsen the hemorrhage, not stop it.

 Prothrombin

Prothrombin complex concentrates can help in severe bleeding related to warfarin or clotting factor deficiencies, but they are not the first-line reversal agent for heparin. Protamine sulfate remains the specific antidote.

Summary:

In the case of heparin-induced hemorrhage, the nurse should anticipate giving protamine sulfate to quickly reverse the effects of heparin and stop the bleeding. Other agents like vitamin K or prothrombin are used for different types of anticoagulant issues, but protamine sulfate is specific to heparin reversal.

Correct Answer: Immediately after completion of the IV dose and 30 minutes before the next administration of the medication.

Explanation

For vancomycin, measuring peak and trough levels is essential to ensure the drug is effective (reaching therapeutic levels) while preventing toxicity, particularly nephrotoxicity and ototoxicity. The trough level is the lowest concentration of the drug in the bloodstream and is drawn 30 minutes before the next scheduled dose. This ensures that the minimum drug level remains therapeutic. The peak level is the highest concentration of the drug in the bloodstream and is drawn immediately after the completion of the IV infusion, not after a delay, because vancomycin is usually infused slowly over at least 60 minutes to reduce the risk of infusion reactions like "red man syndrome." Drawing the peak immediately after the infusion provides the most accurate measurement of the highest concentration in the blood. Immediately after completion of the IV dose and 30 minutes before the next administration of the medication. correctly describes: 

Peak: Immediately after the infusion finishes.

Trough: Thirty minutes before the next dose.

This timing helps healthcare providers adjust vancomycin dosing to keep blood levels therapeutic and safe.

Why the other options are incorrect:

One hour after completion of the IV dose and one hour before the next administration of the medication:

This is incorrect because waiting one hour after the infusion ends to draw the peak will likely result in a lower, inaccurate peak level due to the body's natural metabolism and elimination of the drug. Similarly, drawing the trough one hour before the next dose is too early to represent the lowest drug level.

Two hours after completion of the IV dose and two hours before the next administration of the medication:

This is incorrect because waiting two hours after infusion to draw the peak is too late, as the drug levels will have declined significantly by then. Also, drawing the trough two hours before the next dose is too early and may not reflect the true lowest concentration.

 Thirty minutes into the administration of the IV dose and thirty minutes before the next administration of the medication:

This is incorrect because drawing a level during the infusion does not accurately capture the peak or trough levels. The trough timing here is correct, but the peak should not be measured during the dose; it should be done immediately after the infusion finishes.

Summary:

The correct answer is Immediately after completion of the IV dose and 30 minutes before the next administration of the medication because accurate vancomycin monitoring requires drawing the peak immediately after infusion and the trough thirty minutes before the next dose. This ensures the drug remains within the therapeutic range to maximize effectiveness and minimize the risk of kidney or ear damage. The other options provide incorrect timings that would give unreliable or misleading results.

Correct Answer: Drowsiness

Explanation

Drowsiness is a common adverse effect of procainamide, particularly due to its effects on the central nervous system.

Procainamide is a Class Ia antiarrhythmic drug used to treat atrial and ventricular dysrhythmias.

It can cause CNS depression, leading to symptoms like drowsiness, dizziness, and fatigue.

Patients should be monitored for excessive sedation, as this may indicate toxicity or drug accumulation, especially in those with impaired renal function.

Explanation of the Incorrect Answers:

Nystagmus

Nystagmus is not a typical adverse effect of procainamide. While CNS toxicity can occur, nystagmus is more commonly associated with other medications, such as phenytoin toxicity.

Convulsions 

Seizures or convulsions are not common adverse effects of procainamide. They may occur in severe toxicity, but drowsiness is a more frequent and early CNS effect.

Dry mouth 

Procainamide does not have significant anticholinergic properties, so dry mouth is not a typical adverse effect. Dry mouth is more commonly associated with anticholinergic drugs like atropine or tricyclic antidepressants.

Summary:

The correct answer is Drowsiness because procainamide commonly causes CNS depression, leading to fatigue and sedation. Nystagmus and convulsions are not typical adverse effects, and dry mouth is not associated with procainamide.

Correct Answer: Severe acute anaphylactic response.

Explanation

Severe acute anaphylactic response is correct because the symptoms described in the question are classic signs of anaphylaxis, which is a severe, life-threatening allergic reaction. Anaphylaxis typically occurs rapidly after exposure to an allergen such as penicillin and presents with symptoms such as:

Difficulty breathing due to airway swelling or bronchospasm.

Hives or urticaria, which are itchy, raised, red welts on the skin.

Hypotension or dangerously low blood pressure, caused by widespread vasodilation and increased capillary permeability.

Feeling ill, which may include dizziness, confusion, or a sense of impending doom.

Anaphylaxis is a medical emergency that requires immediate action, including administration of epinephrine, airway management, and supportive care. If not treated promptly, anaphylaxis can rapidly lead to respiratory failure, shock, and death. Penicillin is a well-known trigger of anaphylaxis in sensitive individuals, making this scenario highly indicative of this reaction.

Why the Other Options Are Wrong:

Side reaction that should resolve

A side reaction, also called a side effect, is an expected or predictable effect of a drug that is usually mild and not life-threatening. Examples of common penicillin side effects include mild nausea, diarrhea, or rash. However, difficulty breathing, hives, and hypotension are not typical side effects of penicillin. These are signs of a severe allergic reaction, not something that will simply resolve without intervention. Ignoring these symptoms under the assumption they will resolve could be fatal.

Idiosyncratic reaction is incorrect.

An idiosyncratic reaction is an unpredictable and uncommon reaction to a drug that is not related to the drug's normal effects and not due to an allergic mechanism. These reactions often occur due to genetic differences in drug metabolism. For example, some people may have unusual reactions to certain drugs, such as developing hemolytic anemia after taking specific medications. The symptoms in the question are typical of an allergic reaction, not an unusual or unique response unrelated to the immune system.

 Cumulative drug response is incorrect.

A cumulative drug response occurs when a drug builds up in the body over time due to repeated doses, typically when the body cannot adequately metabolize or excrete the drug. This can lead to toxicity. However, the client in the question took only the first dose of penicillin, so a cumulative response is impossible in this case. Additionally, cumulative toxicity usually presents with symptoms related to overdose, not with acute allergic signs like hives, difficulty breathing, or hypotension.

Summary:

The correct answer is Severe acute anaphylactic response because the client's symptoms are classic for anaphylaxis, which is a severe and life-threatening allergic reaction to penicillin requiring immediate emergency intervention. The other options are incorrect because side reactions are typically mild and not life-threatening, idiosyncratic reactions are rare and unpredictable without allergic features, and cumulative drug responses occur over time after repeated doses, which does not apply to a first dose reaction. Recognizing anaphylaxis quickly is critical to saving a person's life.

Correct Answer: Promotes excretion of uric acid in the urine.

Explanation 

Promotes excretion of uric acid in the urine

Probenecid is a uricosuric drug that works by inhibiting the reabsorption of uric acid in the renal tubules, which results in increased excretion of uric acid in the urine. This helps to lower serum uric acid levels and prevent the formation of urate crystals, which cause painful gout attacks. Probenecid is often used in chronic gout management rather than for acute attacks. It is prescribed to prevent future gout flares and is usually given to patients with underexcretion of uric acid, which is a common cause of gout. Patients taking probenecid should be advised to drink plenty of fluids to reduce the risk of kidney stone formation, as increased uric acid excretion can sometimes lead to uric acid kidney stones.

Explanation of Incorrect Answers:

Decreases pain and burning during urination

Probenecid does not have analgesic or anti-inflammatory properties that would relieve burning or pain during urination. Painful urination (dysuria) is commonly associated with urinary tract infections (UTIs) or conditions like interstitial cystitis, which require different treatments such as antibiotics or urinary analgesics like phenazopyridine (Pyridium). Probenecid primarily affects uric acid excretion and is not used for urinary discomfort

Prevents the formation of kidney stones

While probenecid helps excrete uric acid, it does not prevent all types of kidney stones. In fact, probenecid can sometimes increase the risk of uric acid kidney stones if the patient does not drink enough fluids. Calcium oxalate kidney stones are the most common type, and their prevention often involves dietary modifications and the use of medications like thiazide diuretics, not probenecid. To prevent kidney stones while taking probenecid, patients are encouraged to increase water intake and possibly alkalinize their urine with sodium bicarbonate or potassium citrate.

Increases the strength of the urine stream

Probenecid has no effect on urine flow or bladder function. Weak urine stream is often a symptom of benign prostatic hyperplasia (BPH) or urinary retention, which is treated with alpha-blockers such as tamsulosin (Flomax) or 5-alpha reductase inhibitors like finasteride. Probenecid does not work on the bladder, prostate, or urethra, so it would not help with improving the urine stream.

Summary:

Probenecid is a uricosuric agent that helps prevent gout attacks by increasing uric acid excretion in the urine. It does not relieve urinary pain, prevent all kidney stones, or improve urine strea