RN Pharmacology BSN 315

Correct Answer: Renal protective effects

Explanation

Angiotensin-converting enzyme (ACE) inhibitors are prescribed for patients with type 2 diabetes and proteinuria because they have renal protective effects. Diabetes is a major cause of chronic kidney disease (CKD), and proteinuria (the presence of excess protein in the urine) is an early sign of diabetic nephropathy. ACE inhibitors slow the progression of kidney disease by reducing intraglomerular pressure, decreasing proteinuria, and preventing further kidney damage. They achieve this by inhibiting the conversion of angiotensin I to angiotensin II, which reduces vasoconstriction and lowers glomerular filtration pressure, ultimately reducing albuminuria and preserving kidney function. Clinical guidelines recommend ACE inhibitors (or angiotensin II receptor blockers ARBs) as first-line treatment for diabetic nephropathy because of their protective effects on kidney function.

Explanation of the Incorrect Answers:

Promotes fluid output

While ACE inhibitors may have a mild diuretic-like effect, they are not primarily used to promote fluid output. Diuretics like furosemide (Lasix) or hydrochlorothiazide (HCTZ) are more commonly prescribed for fluid retention in diabetic kidney disease.

Cardio protective effects 

ACE inhibitors do have cardioprotective benefits, especially in patients with heart failure and hypertension, by reducing afterload, decreasing left ventricular remodeling, and lowering the risk of cardiovascular events. However, in the context of this question (a patient with diabetes and proteinuria), the primary reason for prescribing an ACE inhibitor is renal protection, not cardiac protection.

Reduces blood pressure

While ACE inhibitors do lower blood pressure by inhibiting angiotensin II (a potent vasoconstrictor), this is not the primary reason for prescribing them in a diabetic patient with proteinuria. Even in normotensive diabetic patients, ACE inhibitors are still recommended specifically for their kidney-protective effects, independent of their antihypertensive action.

Summary:

The correct answer is Renal protective effects because ACE inhibitors slow the progression of diabetic nephropathy by reducing proteinuria and preserving kidney function. Although ACE inhibitors lower blood pressure and have cardioprotective benefits their primary role in this patient is kidney protection. They are not primarily prescribed to promote fluid output.

Correct Answer: Take and record radial pulse rate daily.

Explanation

Digoxin (Lanoxin) is a cardiac glycoside commonly prescribed to treat heart failure and atrial fibrillation. One of the most important aspects of safe digoxin therapy is monitoring for bradycardia (a slow heart rate), which can be a sign of digoxin toxicity. Therefore, the nurse should instruct the client to take their radial pulse daily, preferably at the same time each day before taking the medication, and record the pulse rate. The client should also be taught that if the pulse rate is below sixty beats per minute, they should hold the dose and contact their healthcare provider. This monitoring helps detect early signs of toxicity and prevents serious complications like dangerous arrhythmias.

Why the other options are incorrect:

Take the medication in the morning before rising.

This is incorrect because digoxin timing is not dependent on waking up or rising from bed. It is generally recommended to take digoxin at the same time every day, but it does not need to be taken before getting out of bed. Consistency with timing is important, but this statement is not accurate patient teaching.

Expect some vision changes caused by the medication.

This is incorrect because vision changes (such as blurred vision, yellow-green halos, or other disturbances) are actually signs of digoxin toxicity, not normal side effects to expect. If the client experiences vision changes, they should immediately report this to their healthcare provider, as it may indicate dangerous digoxin levels. Telling the patient to "expect" vision changes would delay necessary medical attention for toxicity.

 Increase intake of foods rich in vitamin K.

This is incorrect because vitamin K is important for reversing the effects of anticoagulants like warfarin (Coumadin), but it has no direct relationship with digoxin therapy. Increasing vitamin K intake is not necessary or helpful for someone taking digoxin.

Summary:

The most critical teaching for a client taking digoxin is to monitor their radial pulse daily and record it, holding the medication and notifying the provider if the pulse drops below sixty beats per minute. This helps prevent digoxin toxicity, which can be life-threatening.

The other options (timing before rising, expecting vision changes, and increasing vitamin K intake) are incorrect or misleading.

Correct Answer: Sucralfate (Carafate).

 Explanation

 Sucralfate (Carafate)

Sucralfate is a gastrointestinal protectant that works by coating the stomach lining. It contains aluminum salts, and when taken with tetracycline antibiotics like tetracycline hydrochloride (Sumycin), it can bind to the tetracycline in the stomach and intestines, forming insoluble complexes. These complexes prevent the proper absorption of tetracycline into the bloodstream, which decreases the effectiveness of the antibiotic. To avoid this interaction, tetracycline and sucralfate should be taken at least two hours apart.

Why the Other Options Are Incorrect:

Hydrochlorothiazide (Diuril)

Hydrochlorothiazide is a thiazide diuretic used to treat high blood pressure and fluid retention. While it can have interactions with some medications, it does not significantly interfere with tetracycline absorption.

 Acetaminophen (Tylenol)

Acetaminophen is a pain reliever and fever reducer. It is not known to interfere with the absorption of tetracycline and can generally be taken safely alongside antibiotics.

Phenytoin (Dilantin)

Phenytoin is an anticonvulsant. It can affect the metabolism of some drugs through liver enzyme induction, but it does not directly interfere with tetracycline absorption in the gastrointestinal tract like sucralfate does. However, long-term phenytoin use might decrease the effectiveness of some antibiotics, but not via absorption issues.

Summary:

The primary concern with tetracycline antibiotics like Sumycin is interference from substances that contain metal ions or compounds (like calcium, magnesium, iron, and aluminum), which bind to the antibiotic and reduce absorption. Sucralfate (Carafate) is one such medication due to its aluminum content. Therefore, the correct answer is  Sucralfate (Carafate).

Correct Answer: Ask the client to rate the current level of pain using a pain scale

Explanation:

When a client in the surgical recovery area asks for pain medication, assessing the client's pain level first is a crucial priority. The nurse needs to understand the severity of the pain in order to determine the appropriate dosage of pain medication. A pain scale provides a clear indication of the client's pain level, allowing the nurse to make an informed decision about the best course of action. The primary goal is to manage the client's pain effectively. Asking the client to rate their pain will guide the nurse's decision on whether additional medication is necessary and appropriate. It also helps the nurse assess whether the current level of pain warrants a new dose of medication or if other interventions might be needed.

Why the other options are not as immediate:

Review the history for a past use of recreational drugs:

This information is important for understanding the client's risk for drug dependence or tolerance, but it does not immediately address the current request for pain relief. The priority should be assessing and managing the client’s current pain level first.

Determine when the last dose was administered:

While knowing the last dose is important to avoid overmedication, it's part of the pain management protocol after assessing the current pain. The client’s pain level should be established first so that the nurse can adjust the medication appropriately.

Encourage the client to use diversional thoughts to manage pain

While helpful in complementary pain management, diversional techniques are not the priority in the case of a client requesting medication. First, the nurse must assess the current pain to decide if pharmacologic intervention is necessary.

Summary:

The first priority is to assess the client's pain level by asking them to rate it using a pain scale. This helps guide the nurse in providing the most appropriate pain management, including the potential need for medication.

Correct Answer: Prothrombin Time (PT/INR).

Explanation:

Warfarin (Coumadin) is an oral anticoagulant that works by inhibiting the vitamin K-dependent clotting factors (II, VII, IX, and X). Because warfarin affects the blood’s ability to clot, it is crucial to monitor the prothrombin time (PT) and international normalized ratio (INR) regularly. The INR is a standardized way of measuring the PT, making it easier to compare results across different laboratories. The PT/INR test helps assess how long it takes for blood to clot and ensures that the warfarin dose is within the therapeutic range. The therapeutic INR range for most conditions, including pulmonary embolism, is typically between 2.0 and 3.0, although it may vary based on the condition being treated.

Why the Other Options Are Incorrect:

Perfusion scan: A perfusion scan (also known as a ventilation/perfusion scan or V/Q scan) is used to assess lung function and is primarily used for diagnosing conditions like pulmonary embolism. It is not a routine test needed for monitoring the effects of warfarin.

Activated partial thromboplastin (APTT): APTT is typically used to monitor the effects of heparin, not warfarin. Heparin and warfarin are both anticoagulants, but they have different mechanisms of action, and they require different monitoring parameters. APTT is not relevant for warfarin therapy.

Serum Coumadin level (SCL): Warfarin (Coumadin) does not have a serum level that is routinely measured like some other medications (e.g., digoxin). Instead, the PT/INR is used to monitor the therapeutic effect of warfarin.

Summary:

After starting warfarin therapy, it is important to monitor the PT/INR regularly to ensure that the anticoagulation is at the appropriate therapeutic level and to avoid complications such as bleeding or clotting. Therefore, the correct answer is B. Prothrombin Time (PT/INR)

Correct Answer: Digoxin (Lanoxin)

Explanation 

Digoxin (Lanoxin)

Digoxin is a cardiac glycoside that has a positive inotropic effect, meaning it increases the strength of cardiac contractions. It is used in heart failure to improve myocardial contractility and reduce symptoms of heart failure by enhancing cardiac output. Digoxin also has a negative chronotropic effect (slows heart rate), which can be beneficial in conditions such as atrial fibrillation.

Explanation of the Incorrect Answers:

Valsartan (Diovan) 

Valsartan is an angiotensin II receptor blocker (ARB) used to lower blood pressure and reduce afterload in heart failure patients. It does not have a positive inotropic effect; instead, it reduces cardiac workload and prevents fluid retention.

Atenolol (Tenormin) 

Atenolol is a beta blocker that has a negative inotropic effect, meaning it decreases the force of cardiac contractions.  It is used to lower heart rate and reduce blood pressure but does not enhance myocardial contractility.

 Diltiazem (Cardizem) 

Diltiazem is a calcium channel blocker that primarily affects heart rate and blood pressure. It has a negative inotropic effect, reducing cardiac contractility, which can be harmful in some heart failure patients.

Summary:

The correct answer is Digoxin (Lanoxin) because it has a positive inotropic effect, increasing the strength of heart contractions and improving cardiac output in heart failure. The other medications do not have this effect: Valsartan lowers blood pressure, Atenolol and Diltiazem reduce contractility, making them unsuitable as positive inotropic agents.

Correct Answer: Take medication, go for a 30-minute morning walk, then eat breakfast.

Explanation:

Alendronate (Fosamax) is a medication used to treat osteoporosis. Proper administration of alendronate is essential for its effectiveness and to reduce the risk of gastrointestinal side effects, particularly esophageal irritation or ulcers. The key points for alendronate administration are:

Take the medication on an empty stomach with a full glass of water

Wait at least 30 minutes before eating, drinking, or lying down to allow the medication to be properly absorbed and to prevent irritation of the esophagus.

The correct schedule would be to take the medication first, then go for a 30-minute walk (which helps with bone health), and finally eat breakfast after the 30-minute waiting period.

Why Other Options Are Incorrect:

Take medication, rest in bed for 30 minutes, eat breakfast, go for morning walk: While this option follows the correct waiting period after taking the medication, resting in bed is not necessary. The client should remain upright for at least 30 minutes after taking alendronate to reduce the risk of esophageal irritation, but there is no need to rest in bed. A walk or standing is recommended.

 Take medication with breakfast, then take a 30-minute morning walk: This option is incorrect because alendronate should not be taken with food. The medication must be taken on an empty stomach to ensure optimal absorption.

Go for a 30-minute morning walk, eat breakfast, then take medication: This schedule is incorrect because it suggests taking the medication after breakfast. To avoid reduced effectiveness, alendronate should be taken before eating and on an empty stomach.

Summary:

The most effective schedule is to take the medication, then go for a 30-minute walk, and finally eat breakfast after waiting for at least 30 minutes. This method maximizes the absorption of the medication and minimizes the risk of side effects.

Correct Answer: Immediately before the next antibiotic dose is given.

Explanation:

The trough level is the lowest concentration of the antibiotic in the blood, which is typically drawn just before the next dose is administered, to ensure the drug's levels are within the therapeutic range. This helps prevent toxicity while maintaining the drug's effectiveness.

Why Other Options are Incorrect

Sixty minutes after the antibiotic dose is administered:

 This is the time to obtain the peak level, not the trough level. The peak level measures the highest concentration of the antibiotic in the blood, which is typically drawn after the dose is administered, usually about 30 to 60 minutes after administration.

When the next blood glucose level is to be checked:

 This is unrelated to the timing for obtaining trough levels. Blood glucose monitoring is not associated with the timing of antibiotic trough levels

Thirty minutes before the next antibiotic dose is given

 The trough level should be drawn immediately before the next dose, not 30 minutes before. Waiting until just before the dose helps ensure an accurate reading of the lowest concentration of the drug.

Conclusion:

Immediately before the next antibiotic dose is given is the correct time to obtain a trough level, which ensures that the drug concentration is at its lowest point, helping to assess the adequacy of the dosage and avoid potential toxicity.

Correct Answer: Encourage the client to wait until bedtime to take the medication.

Explanation

Zolpidem is a hypnotic medication primarily prescribed for the short-term treatment of insomnia. It works by slowing down brain activity to promote sleep. Zolpidem is intended to be taken right before bedtime, and patients are instructed to ensure they can dedicate a full night (typically seven to eight hours) to sleep after taking it. Encouraging the client to wait until bedtime is the safest and most appropriate action because:

Taking zolpidem during the day, even for a nap, significantly increases the risk of excessive daytime drowsiness, impaired alertness, confusion, and accidental injury (such as falls or car accidents).

Zolpidem has a rapid onset of action and is not designed for short naps or daytime use.

Using zolpidem during waking hours may also disrupt the person's normal sleep-wake cycle.

Why the other options are incorrect:

Explain that the client needs to allow for sleep time of at least two hours.

This is incorrect because zolpidem is not approved or recommended for short sleep periods like a two-hour nap. The drug requires a full night's sleep time to minimize the risk of next-day impairment. Taking it for a short nap could leave the client groggy and unsafe afterward.

Advise the client to take the medication with the noon meal.

This is incorrect because food, especially high-fat meals, can delay the absorption of zolpidem and reduce its effectiveness. More importantly, taking zolpidem with lunch in the middle of the day increases the danger of daytime sedation and accidental harm.

Remind the client to drink plenty of fluids when taking the medication.

This is incorrect because increasing fluids is not necessary with zolpidem and may actually be counterproductive if it causes nighttime awakenings to urinate. Fluid intake has no meaningful role in preventing side effects or improving the medication’s effectiveness.

Summary:

The correct answer is Encourage the client to wait until bedtime to take the medication, because zolpidem should only be taken right before bedtime, when the client can devote a full night to sleep. Taking it during the day, even for a nap, increases the risk of dangerous side effects like drowsiness and impaired function. The other options are incorrect because they either promote inappropriate use, provide unsafe advice, or give irrelevant instructions.