D441 Medical Dosage Calculations and Pharmacology - Set 3 - Part 2

Correct Answer: Albuterol rescue inhaler

in the AIM protocol for acute asthma, albuterol is the first-line rescue medication given as a beta-two agonist that provides rapid bronchodilation with two to four puffs every twenty minutes. Option b is incorrect because ipratropium nebulizer is the second step in the asthma attack protocol after albuterol, and using it first would delay the rapid bronchodilation that the rescue inhaler provides as the initial intervention. Option c is incorrect because methylprednisolone, an intravenous steroid, is the third step in the acute asthma management protocol and is used after both albuterol and ipratropium have been administered to reduce inflammation. Option d is incorrect because montelukast is a preventive medication that takes one to two weeks to reach therapeutic effect and is not appropriate for treating an active acute asthma attack requiring immediate bronchodilation.

Correct Answer: Full therapeutic effects take one to two weeks

montelukast is a preventive anti-inflammatory medication that requires one to two weeks of consistent use before reaching full therapeutic effectiveness in reducing asthma attack frequency and severity. Option a is incorrect because montelukast is appropriately prescribed for prevention of asthma attacks, and the lack of immediate effect after only three days is expected given the medication's delayed onset of therapeutic action. Option b is incorrect because doubling the dose of montelukast would not accelerate its onset of action, and dose changes should only be made by the prescribing provider based on clinical evaluation after an adequate trial period. Option c is incorrect because montelukast prevents the inflammation response that triggers asthma attacks and is specifically a maintenance medication, not a rescue drug designed for use during acute asthma episodes.

Correct Answer: Fifteen minutes before physical activity

cromolyn prevents activity-induced asthma and should be taken fifteen minutes before physical exertion to achieve maximum protective effect against exercise-triggered bronchospasm during athletic activity. Option a is incorrect because taking cromolyn immediately after exercise provides no preventive benefit since the medication must be administered before physical activity begins to establish its protective anti-inflammatory effect against bronchospasm. Option c is incorrect because cromolyn taken one hour after practice would offer no protection against exercise-induced asthma, as the medication needs to be in the system before the triggering physical activity occurs. Option d is incorrect because cromolyn is a preventive medication designed to be used before asthma symptoms begin, not a rescue medication to be used after wheezing has already started during an active episode.

Correct Answer: Expected side effects of the medication

albuterol is a beta-two agonist that commonly causes tachycardia, palpitations, and feeling jittery as expected side effects due to its stimulatory action on adrenergic receptors throughout the body. Option a is incorrect because tachycardia and jitteriness following albuterol use are pharmacologically predictable side effects of beta-two agonist stimulation, not warning signs of an anaphylactic reaction requiring emergency intervention. Option b is incorrect because tachycardia and palpitations are known and expected responses to albuterol that do not warrant permanent discontinuation, as these effects are part of the medication's normal pharmacological profile. Option d is incorrect because a true medication allergy to albuterol would present with symptoms like rash, hives, swelling, or difficulty breathing, not the tachycardia and jitteriness that result from its expected beta-agonist activity.

Correct Answer: Elevated blood glucose levels

methylprednisolone is a systemic corticosteroid that increases blood glucose levels as a well-known metabolic effect, requiring the nurse to monitor glucose closely especially in diabetic patients during treatment. Option b is incorrect because systemic corticosteroids like methylprednisolone typically increase white blood cell counts rather than decrease them, and leukopenia is not a characteristic metabolic effect of steroid administration for asthma management. Option c is incorrect because methylprednisolone does not cause sudden bradycardia, and a drop in heart rate would be more associated with medications like beta-blockers or digoxin rather than intravenous corticosteroid therapy for acute asthma. Option d is incorrect because corticosteroids tend to promote potassium excretion rather than causing potassium levels to rise, and hyperkalemia is not an expected metabolic effect of methylprednisolone administration in asthma treatment.

Correct Answer: Clear insulin is drawn up before cloudy

when mixing insulins, the nurse draws up clear insulin first then cloudy, following the principle of clear to cloudy to prevent contamination of the regular insulin vial with NPH particles. Option a is incorrect because drawing cloudy NPH insulin first would risk contaminating the regular insulin vial with the intermediate-acting suspension, which could unpredictably alter the onset and peak times of future regular insulin doses. Option b is incorrect because the order absolutely matters when mixing insulins, as drawing regular insulin first protects its vial from contamination with NPH, maintaining the integrity of both insulin preparations for safe use. Option c is incorrect because NPH and regular insulin are commonly mixed in one syringe to reduce the number of injections the patient receives, and drawing them into separate syringes is not the standard recommended technique.

Correct Answer: Severe hypoglycemia from rapid onset

insulin lispro has a rapid fifteen-minute onset and peaks within thirty to ninety minutes, so a delayed meal creates a dangerous risk of severe hypoglycemia as the insulin acts without available glucose. Option a is incorrect because insulin lispro was already administered and actively lowering blood glucose, making hyperglycemia from insulin resistance an unlikely immediate concern when the primary risk is rapidly falling blood sugar levels. Option c is incorrect because allergic skin reactions at the injection site are not the primary safety concern when a rapid-acting insulin has been given without food, as the life-threatening risk of hypoglycemia takes clinical priority. Option d is incorrect because diabetic ketoacidosis results from insufficient insulin rather than from a delayed meal after insulin administration, and the immediate danger in this scenario is hypoglycemia from the active rapid insulin.

Correct Answer: Intramuscular or subcutaneous injection

the glucagon emergency kit is designed for intramuscular or subcutaneous administration by caregivers when a diabetic patient is unconscious or unable to take anything by mouth to reverse hypoglycemia. Option b is incorrect because an unconscious patient cannot safely receive oral medications including sublingual tablets due to the risk of aspiration, and glucagon emergency kits are specifically formulated for injection administration. Option c is incorrect because home caregivers would not have intravenous access available, and the glucagon emergency kit is specifically designed for intramuscular or subcutaneous injection that can be safely administered outside clinical settings. Option d is incorrect because glucagon is not available as a topical preparation, and applying medication to the skin would not provide the rapid systemic absorption needed to reverse dangerous hypoglycemia in an unconscious patient.

Correct Answer: Regular insulin

regular insulin is the only type of insulin approved for intravenous administration, making it the appropriate choice for emergency situations like diabetic ketoacidosis where precise IV dosing is required. Option a is incorrect because NPH is an intermediate-acting insulin that should never be given intravenously, as it is a suspension containing particles that could cause harm if administered directly into the bloodstream through an IV line. Option b is incorrect because glargine is a long-acting insulin with no peak that is designed solely for subcutaneous injection and cannot be mixed or administered intravenously due to its unique formulation and prolonged absorption profile. Option d is incorrect because although insulin lispro is rapid-acting, it is designed for subcutaneous administration before meals and is not the insulin type designated for intravenous use in emergency clinical situations like diabetic ketoacidosis.

Correct Answer: Its peak occurring at four to twelve hours

NPH insulin peaks between four and twelve hours after administration, and the hypoglycemic symptoms occurring four hours after the morning dose align directly with the insulin reaching its peak activity. Option a is incorrect because a duration of twenty-four hours describes long-acting insulins like glargine and detemir, not NPH, which has an intermediate duration of approximately fourteen hours and a distinct peak window. Option b is incorrect because a fifteen-minute onset describes rapid-acting insulins like lispro and aspart, not NPH insulin, which is an intermediate-acting formulation with a slower onset and a peak between four and twelve hours. Option c is incorrect because while NPH is given twice daily, the dosing schedule alone does not explain the hypoglycemic episode, which is specifically related to the insulin reaching its peak activity level four hours after administration.

Correct Answer: Angioedema

angioedema, characterized by swelling of the face, lips, and tongue, is a serious adverse effect of ACE inhibitors like captopril that requires immediate medical attention due to potential airway compromise. Option a is incorrect because orthostatic hypotension causes dizziness and lightheadedness upon standing due to blood pressure drops, and does not present with visible swelling of the lips, tongue, or facial structures seen in this patient. Option c is incorrect because hyperkalemia from ACE inhibitors presents with cardiac rhythm changes and muscle weakness rather than facial and tongue swelling, which is specifically characteristic of the angioedema reaction to these medications. Option d is incorrect because persistent dry cough is a common ACE inhibitor side effect caused by bradykinin accumulation in the lungs, but it does not cause the visible tissue swelling of the lips and tongue described in this scenario.

Correct Answer: Dangerous hyperkalemia

spironolactone is a potassium-sparing diuretic that carries a high risk of hyperkalemia, and a potassium level of six point two significantly exceeds the critical threshold of five point five requiring urgent intervention. Option a is incorrect because while spironolactone is expected to conserve potassium, a level of six point two milliequivalents per liter exceeds the safe range and represents a dangerous elevation that could cause life-threatening cardiac dysrhythmias. Option b is incorrect because the elevated potassium level actually confirms that spironolactone is actively sparing potassium as intended, but the level has risen to a dangerously high point requiring immediate clinical action and dose adjustment. Option d is incorrect because a potassium level of six point two milliequivalents per liter is far above normal range and represents a medical emergency, particularly in a patient on a potassium-sparing diuretic with known hyperkalemia risk.

Correct Answer: Blood pressure readings

captopril is an ACE inhibitor prescribed specifically to lower blood pressure, making blood pressure the most important vital sign to monitor for both therapeutic effectiveness and risk of hypotension. Option b is incorrect because while heart rate may change secondarily, captopril's primary mechanism targets blood pressure through the renin-angiotensin system, and blood pressure is the specified priority monitoring parameter rather than heart rate. Option c is incorrect because respiratory rate monitoring is not the primary concern with ACE inhibitor therapy, although a persistent dry cough should be reported, and blood pressure remains the key vital sign for evaluating captopril effectiveness. Option d is incorrect because core body temperature is not directly affected by ACE inhibitor therapy, and monitoring temperature would not provide useful information about captopril's therapeutic effectiveness or adverse effects on blood pressure.

Correct Answer: Hypokalemia from potassium loss

furosemide is a loop diuretic that causes rapid diuresis and significant potassium excretion in the urine, placing patients at high risk for hypokalemia that can lead to dangerous cardiac complications. Option a is incorrect because furosemide promotes sodium and water excretion rather than retention, and hypernatremia is not the primary electrolyte concern associated with loop diuretic therapy causing rapid fluid removal in edematous patients. Option b is incorrect because loop diuretics like furosemide actually increase calcium excretion rather than causing calcium buildup, and hypercalcemia is not an expected or commonly monitored electrolyte imbalance with this medication class. Option c is incorrect because furosemide does not cause magnesium retention or excess, and while magnesium levels may decrease along with potassium during aggressive diuresis, hypokalemia remains the primary electrolyte monitoring concern.

Correct Answer: ACE inhibitors must be avoided in pregnancy

ACE inhibitors like captopril are contraindicated in pregnancy due to the risk of serious fetal harm, and this is a critical component of the AACE mnemonic that the nurse must communicate immediately. Option a is incorrect because patients on ACE inhibitors should actually avoid potassium-rich foods since captopril causes elevated potassium levels, and increasing potassium intake would worsen the risk of dangerous hyperkalemia. Option c is incorrect because captopril does not cause permanent infertility, and this inaccurate information could unnecessarily alarm the patient, whereas the actual concern is the teratogenic risk to the developing fetus during pregnancy. Option d is incorrect because increasing the captopril dose before conception would be harmful and contraindicated, as the medication must be discontinued prior to pregnancy rather than adjusted upward due to known fetal toxicity risks.

Correct Answer: It decreases dangerous ammonia levels

lactulose decreases ammonia levels in patients with liver disease by trapping ammonia in the colon and promoting its excretion through bowel movements, which improves cognitive function and prevents hepatic encephalopathy. Option a is incorrect because lactulose is not used for gastric ulcer prevention, which would require medications like sucralfate or misoprostol, and its mechanism of trapping ammonia in the colon is unrelated to gastric acid or ulcer management. Option b is incorrect because lactulose does not increase nutrient absorption and actually promotes diarrhea as its mechanism of action, accelerating intestinal transit time which would decrease rather than improve nutrient absorption from food. Option d is incorrect because lactulose does not directly affect portal vein blood pressure, and medications targeting portal hypertension work through different mechanisms than the osmotic laxative effect that lactulose uses to remove ammonia.

Correct Answer: On an empty stomach four times daily

sucralfate should be taken on an empty stomach four times daily, including at bedtime, and one to two hours before or after eating or taking other medications to form its protective coating effectively. Option b is incorrect because taking sucralfate immediately after meals would reduce its ability to form a thick protective barrier over the ulcer, as food in the stomach interferes with the medication binding directly to the damaged mucosal tissue. Option c is incorrect because sucralfate should be taken on an empty stomach rather than with milk, and dairy products could interfere with the medication's ability to adhere properly to the ulcer site and provide its protective coating. Option d is incorrect because sucralfate is not designed to be mixed with food and must be taken on an empty stomach to allow it to coat the ulcer effectively, with a two-hour separation from meals and other medications.

Correct Answer: Confirm the patient is not pregnant

misoprostol carries a high risk of fetal malformation including clubfoot, cranial nerve abnormalities, and absence of fingers, making pregnancy confirmation the absolute priority before administering this medication. Option a is incorrect because blood pressure assessment is not the priority concern with misoprostol, which is prescribed for acid prevention during long-term NSAID therapy, and the critical safety check involves pregnancy status due to teratogenic risk. Option b is incorrect because calcium supplement use is a relevant consideration for tetracycline therapy rather than misoprostol, and the priority assessment before giving misoprostol focuses on ruling out pregnancy due to severe fetal malformation risk. Option c is incorrect because while liver function is important for many medications, the critical safety assessment before administering misoprostol is confirming the patient is not pregnant due to the well-documented risk of serious birth defects.

Correct Answer: Take antacids two hours apart from other meds

antacids block the metabolism and absorption of most medications, so they must be taken at least two hours before or after other prescription drugs to prevent dangerous drug interactions. Option a is incorrect because antacids actually interfere with the absorption and metabolism of most medications rather than enhancing them, which is why proper timing separation of at least two hours between antacids and other drugs is essential. Option c is incorrect because the critical teaching point about antacids involves their interaction with other medications and the required two-hour separation, not their relationship with food timing, which is the priority safety concern here. Option d is incorrect because antacids require careful timing adjustments when a patient takes other prescription medications, and failing to separate administration by at least two hours can significantly reduce the effectiveness of other drugs.

Correct Answer: Separate the two medications by two hours

sucralfate must be taken one to two hours before or after other medications to prevent interference with drug absorption, so the nurse should instruct the patient to space them at least two hours apart. Option a is incorrect because taking sucralfate simultaneously with other medications like levothyroxine would allow sucralfate's protective coating properties to bind with and reduce the absorption of the other drug, decreasing its therapeutic effectiveness. Option b is incorrect because levothyroxine should typically be taken on an empty stomach for optimal absorption, and the question focuses on the drug interaction between sucralfate and other medications rather than food timing for levothyroxine. Option d is incorrect because while taking sucralfate on an empty stomach is correct, this response does not address the patient's actual question about combining both medications, and the critical teaching involves the required two-hour separation.