ATI-P ATI Pharmacology - Set 3 - Part 1

Correct Answer: This medication decreases stomach acid production.

Omeprazole is a proton pump inhibitor that reduces gastric acid secretion by blocking the enzyme that produces it. Teaching the client that the drug lowers stomach acid reflects its expected pharmacologic action. Option a is incorrect because omeprazole works best taken once each morning before eating, so a bedtime schedule does not fit. Where this option fails is timing, since the drug should precede the day's first meal rather than follow it. Option b is incorrect because long-term proton pump inhibitor use is linked to a low magnesium level, not a high potassium level. This option names the wrong electrolyte effect and would mislead the client about what to monitor. Option d is incorrect because sustained-release omeprazole capsules must be swallowed whole. Chewing destroys the protective coating that lets the medication survive stomach acid, so this instruction would defeat the drug's delivery design.

Correct Answer: Dark green or black stools

Oral iron preparations commonly darken the stool to a black or dark green color. This change is harmless and usually continues throughout therapy, so the nurse identifies it as an expected effect rather than a problem. Option b is incorrect because iron supplements color the stool, not the urine. Red urine would raise concern for bleeding or another medication, so it does not belong among the expected responses to ferrous sulfate. Option c is incorrect because clay-colored or pale stools suggest a blockage of bile flow, not iron therapy. Iron darkens stool rather than lightening it, so this finding points toward a liver or biliary issue instead. Option d is incorrect because a yellow skin tint reflects jaundice from liver or blood-cell breakdown problems. Ferrous sulfate does not cause this, so the nurse would investigate another cause rather than attribute it to iron.

Correct Answer: Current pregnancy

Misoprostol can stimulate uterine contractions and induce labor or miscarriage, making it a pregnancy risk category X medication. An existing pregnancy is therefore a clear contraindication to giving this drug. Option a is incorrect because osteoarthritis is not a reason to withhold misoprostol. In fact, clients on long-term anti-inflammatory drugs for joint conditions are among those who receive it to prevent stomach ulcers. Option b is incorrect because a urinary tract infection has no bearing on misoprostol safety. This condition is treated with antibiotics and does not interact with the drug's action on the stomach lining or uterus. Option d is incorrect because a past kidney stone does not contraindicate misoprostol. The drug acts on gastric prostaglandins and the uterus, so a urinary tract history is unrelated to the danger that defines its use.

Correct Answer: Infuse the diluted solution using an infusion pump.

Intravenous potassium must always be diluted and delivered by an infusion pump to control the rate. Slow, controlled infusion prevents a dangerously fast rise in potassium that could trigger fatal heart rhythm changes. Option a is incorrect because adequate urine output is reassuring and supports giving the dose, not holding it. The nurse would withhold potassium for poor output, so this option reverses the correct reasoning about kidney function. Option b is incorrect because potassium is never given by rapid intravenous push, because a sudden surge in the blood can stop the heart. This action describes exactly the lethal error the dilution-and-pump rule exists to prevent. Option c is incorrect because undiluted potassium severely irritates the vein and floods the circulation too quickly. Skipping dilution to save time creates the very hazard that makes careful intravenous potassium administration necessary.

Correct Answer: A high potassium level

Muscle weakness with an irregular pulse during intravenous potassium points to a high potassium level. This is the feared complication of intravenous administration, and the nurse should stop the infusion and notify the provider. Option a is incorrect because a low magnesium level can cause muscle cramps and tremors, but it is not the expected danger when potassium is being infused. The clinical setting here points directly to potassium excess instead. Option b is incorrect because a low blood sugar level produces shakiness, sweating, and confusion rather than this pattern. Potassium infusions do not lower glucose, so hypoglycemia does not explain the weakness and irregular pulse. Option d is incorrect because an underactive thyroid develops gradually with cold intolerance and fatigue, not suddenly during an infusion. These acute findings during intravenous potassium reflect an electrolyte rise, not a thyroid problem.

Correct Answer: Diphenhydramine

Prochlorperazine, a dopamine antagonist, can cause extrapyramidal symptoms such as facial and neck spasms. Diphenhydramine relieves these acute dystonic reactions, so the nurse anticipates a prescription for it. Option b is incorrect because naloxone reverses opioid effects such as respiratory depression and has no role in muscle spasms from a dopamine antagonist. It targets a completely different drug class than the one causing this reaction. Option c is incorrect because vitamin K reverses warfarin-related bleeding, not drug-induced dystonia. This antidote addresses a clotting problem, so it would do nothing for the extrapyramidal muscle spasms that a dopamine antagonist such as prochlorperazine can produce. Option d is incorrect because potassium chloride corrects a low potassium level and is unrelated to muscle spasms triggered by dopamine blockade. Giving it here would treat an electrolyte problem the client does not have.

Correct Answer: Take each dose with a full glass of water.

Psyllium absorbs water to soften and add bulk to stool. Taking it with a full glass of water lets it pass safely and prevents it from swelling and blocking the esophagus or intestine, which is the main safety concern. Option a is incorrect because bulk-forming laxatives are not tied to a bedtime-only schedule and act over a day or more. Restricting the dose to bedtime offers no benefit and ignores the key point about taking it with adequate water. Option b is incorrect because limiting fluids while taking a bulk-forming laxative is dangerous, because the product needs water to move through the gut. Restricting fluid raises the risk of obstruction rather than supporting the laxative effect. Option d is incorrect because bulk-forming laxatives work gradually, not within minutes. Expecting an immediate result fits a rectal stimulant instead, so this sets up a false expectation about how psyllium relieves constipation.

Correct Answer: Diarrhea

Magnesium-based antacids tend to cause diarrhea, while aluminum and calcium products cause constipation. Knowing this difference lets the nurse anticipate loose stools from the magnesium product and alternate compounds to normalize bowel function. Option a is incorrect because constipation is the signature bowel effect of aluminum and calcium antacids, not magnesium. This option assigns the opposite product's effect, which is the classic distinction the question is testing. Option b is incorrect because antacids are not expected to raise blood pressure as a routine effect of the magnesium ingredient. Sodium-containing antacids can promote fluid retention, but that is a separate issue from the bowel effect asked about here. Option c is incorrect because a slow heart rate is not a typical antacid effect tied to magnesium products at usual doses. The expected and most distinguishing finding for this compound is its effect on the bowel, specifically loose stools.

Correct Answer: Reduced number of loose stools

Diphenoxylate activates opioid receptors in the gut to slow intestinal motility and increase fluid absorption. The expected therapeutic effect is a return toward a normal bowel pattern with fewer, more formed stools. Option b is incorrect because this medication acts on the bowel, not the kidneys, so increased urine output is not its purpose. The drug's benefit is measured by slowed diarrhea, making a change in urination an unrelated finding. Option c is incorrect because a faster heart rate would be an adverse anticholinergic effect of the atropine component, not a therapeutic goal. The intended response is control of diarrhea, not a change in pulse. Option d is incorrect because the drug slows the gut, so bowel sounds would decrease rather than increase. Increased bowel sounds would suggest the diarrhea is continuing, which is the opposite of the desired effect.

Correct Answer: A prolonged QT interval

Ondansetron can prolong the QT interval, which may lead to a serious dysrhythmia called torsades de pointes. The nurse monitors clients who have cardiac disorders or electrolyte problems for this heart rhythm change. Option a is incorrect because a slow respiratory rate is not a recognized effect of ondansetron. It points toward opioid or sedative effects, so it does not fit the cardiac risk this serotonin antagonist actually carries. Option b is incorrect because ondansetron does not increase salivation. Drooling reflects cholinergic activity, which is the opposite direction from this drug's profile, so it is not the adverse effect to watch for. Option c is incorrect because constricted pupils suggest opioid effects rather than a serotonin antagonist. The dangerous concern with ondansetron is a heart rhythm change, so a pupil finding misses the real adverse effect.

Correct Answer: Increase your vitamin D and calcium intake.

Long-term acid suppression reduces calcium absorption, which raises the risk of osteoporosis and fractures. Increasing vitamin D and calcium intake helps protect bone density during extended proton pump inhibitor therapy. Option a is incorrect because limiting fiber does nothing to protect bone and can worsen constipation. The fracture risk stems from reduced calcium absorption, so this instruction addresses neither the cause nor the prevention. Option c is incorrect because sodium does not strengthen bone and may promote fluid retention. The missing element here is calcium with vitamin D, not sodium, so this supplement does not target the fracture risk. Option d is incorrect because avoiding weight-bearing activity would weaken bone further, since such activity helps maintain density. This advice is the reverse of what protects the client from the medication's effect on the skeleton.

Correct Answer: Improvement of numbness and tingling

Vitamin B twelve supports nerve and blood cell health, so correcting a deficiency improves neurologic symptoms such as numbness and tingling in the extremities. This recovery is an expected, though sometimes slow, therapeutic response. Option b is incorrect because darkening of the stool is associated with iron therapy, not vitamin B twelve. This finding belongs to a different supplement, so it is not how the nurse evaluates cyanocobalamin's effect. Option c is incorrect because cyanocobalamin corrects anemia and nerve damage but is not given to raise blood pressure. A rise in blood pressure is unrelated to its action, so it does not signal therapeutic success here. Option d is incorrect because yellowing of the skin reflects jaundice from liver or red-cell breakdown problems. Vitamin B twelve replacement actually improves the pallor of anemia rather than producing a yellow tint.

Correct Answer: A low potassium level

As vitamin B twelve stimulates rapid red blood cell production, potassium shifts into the new cells and can drop the blood level. The nurse monitors for a low potassium level, watching for muscle weakness and irregular heart rhythm. Option a is incorrect because a high calcium level is not associated with starting cyanocobalamin. Calcium balance is not affected by the surge in red cell production, so this electrolyte change does not apply here. Option b is incorrect because a low blood sugar level is not an effect of cyanocobalamin. The drug supports blood and nerve cells rather than altering glucose, so hypoglycemia is not the adverse effect to anticipate. Option c is incorrect because a high sodium level is unrelated to vitamin B twelve therapy. The early concern arises from cells taking up potassium, not from sodium accumulating, so this option names the wrong electrolyte.

Correct Answer: Drink plenty of fluids each day.

Sulfasalazine can cause crystals to form in the urine, so a generous daily fluid intake is needed to prevent crystalluria and stone formation. Adequate hydration protects the kidneys during therapy. Option b is incorrect because sulfasalazine is taken with food or after meals to reduce stomach upset, not on an empty stomach. This option reverses the correct administration advice and would leave the client more likely to feel nauseated. Option c is incorrect because restricting fluids would raise the risk of urinary crystals, the very problem the teaching aims to prevent. Rather than supporting kidney safety, this instruction increases the chance of crystalluria and stone formation during therapy. Option d is incorrect because enteric-coated and controlled-release forms of sulfasalazine must not be crushed. Crushing destroys the coating that controls where the drug is released in the gut, so this instruction is both unsafe and incorrect.

Correct Answer: A seizure disorder

Metoclopramide can lower the seizure threshold and increase the risk of seizures, so it is contraindicated in clients who have a seizure disorder. The nurse recognizes this history as a reason to withhold the drug. Option a is incorrect because a history of motion sickness is not a reason to avoid metoclopramide. The true contraindications involve bowel obstruction, bleeding, and seizure disorders rather than susceptibility to motion sickness. Option b is incorrect because a history of migraines is not a contraindication to metoclopramide. Migraines do not interact with the drug's action on dopamine and gut motility, so this history does not bar its use. Option c is incorrect because mild seasonal allergies do not contraindicate metoclopramide and have no effect on its action. They are unrelated to the seizure disorder and bowel concerns that actually govern safe use of this prokinetic agent.

Correct Answer: I should take the full course of combined antibiotics.

H. pylori is treated with a combination of two or three antibiotics taken for the full prescribed course. Completing the regimen increases effectiveness and limits the development of antibiotic resistance, so this statement shows understanding. Option a is incorrect because a single antibiotic is not used, because it breeds resistance. The regimen relies on combining two or three drugs, so this statement reflects a misunderstanding of how the infection is treated. Option b is incorrect because stopping antibiotics early when symptoms improve allows the infection to persist and promotes resistance. This statement shows the client has not grasped the need to finish the full course. Option d is incorrect because antibiotics are the cornerstone of H. pylori treatment, since they eradicate the bacteria causing the ulcer. Saying they are not used reflects a clear misunderstanding of the therapy.

Correct Answer: Depressed deep tendon reflexes

Magnesium toxicity depresses neuromuscular function, producing diminished or absent deep tendon reflexes along with possible respiratory depression. The nurse identifies depressed reflexes as a key sign and keeps calcium gluconate available as the antidote. Option a is incorrect because brisk, exaggerated reflexes suggest too little magnesium or central nervous system excitation, not toxicity. Because excess magnesium suppresses neuromuscular function and reflexes, heightened reflexes point in the opposite direction from what the nurse would expect. Option c is incorrect because increased muscle tone conflicts with magnesium's depressant effect on muscle and nerves. Toxicity produces weakness and flaccidity, so heightened tone is the opposite of what the nurse would find. Option d is incorrect because a rapid heart rate is not the hallmark of magnesium excess, which tends to slow conduction through the heart. The defining sign is reduced reflexes, making tachycardia an unexpected

Correct Answer: Separate the iron and antacid by an hour.

Antacids reduce iron absorption, so the doses should be separated by at least an hour. Spacing them apart preserves the amount of iron the body absorbs and keeps therapy effective. Option b is incorrect because taking both together lets the antacid bind the iron and lower its absorption. This timing reduces the benefit of the supplement, so it is the situation the teaching is meant to avoid. Option c is incorrect because giving the antacid and then the iron immediately afterward still allows them to interact in the stomach. Without an interval, the antacid continues to reduce iron absorption, so close back-to-back dosing does not help. Option d is incorrect because linking the iron only to antacid use makes no clinical sense and would pair the two drugs that interact. The correct approach separates them in time rather than tying their schedules together.

Correct Answer: Draw up the regular insulin first, then the NPH.

When mixing, the nurse draws the clear regular insulin into the syringe first, then the cloudy NPH. This clear-before-cloudy order prevents contaminating the regular insulin vial with the longer-acting insulin. Option a is incorrect because order matters when mixing insulins, so drawing them in any sequence is unsafe. The clear-before-cloudy rule exists specifically to protect the regular insulin vial from being contaminated by the longer-acting cloudy insulin. Option b is incorrect because drawing the NPH first risks carrying cloudy, longer-acting insulin back into the clear regular vial. This reverses the correct sequence and can alter the action of the regular insulin in later doses. Option c is incorrect because insulin vials are gently rolled between the palms, not shaken, because vigorous shaking creates bubbles and foam. Shaking does not address the mixing order at all and can interfere with drawing up an accurate dose.

Correct Answer: Muscle pain with unusual drowsiness

Muscle pain with unusual drowsiness can signal lactic acidosis, a rare but serious metformin complication. The nurse instructs the client to report these findings promptly so the provider can intervene. Option a is incorrect because metformin tends to cause diarrhea rather than constipation, and mild bowel changes are not the urgent concern. The reportable warning is the cluster pointing to lactic acidosis, not constipation. Option b is incorrect because metformin commonly causes loss of appetite and weight loss, not weight gain. A slight weight change is not the serious sign the client must report, unlike the symptoms of lactic acidosis. Option d is incorrect because metformin often decreases appetite, so increased appetite is not an expected or alarming effect of the drug. The pairing of drowsiness with muscle pain is the truly dangerous finding that should prompt a call to the provider.