L2-1530-E1 Flashcards
- Which drugs will go through a pharmaceutic phase after it is administered?
a. Intramuscular cephalosporins
b. Intravenous vasopressors
c. Oral analgesics
d. Subcutaneous antiglycemics
ANS: C
c. Oral analgesics
When drugs are administered parenterally, there is no pharmaceutic phase, which occurs when a drug becomes a solution that can cross the biologic membrane.
- The nurse is preparing to administer an oral medication and wants to ensure a rapid drug action. Which form of the medication will the nurse administer?
a. Capsule
b. Enteric-coated pill
c. Liquid suspension
d. Tablet
ANS: C
c. Liquid suspension
Liquid drugs are already in solution, which is the form necessary for absorption in the GI tract. The other forms must disintegrate into small particles and then dissolve before being absorbed.
- The nurse is teaching a patient who will be discharged home with a prescription for an enteric-coated tablet. Which statement by the patient indicates understanding of the teaching?
a. “I may crush the tablet and put it in applesauce to improve absorption.”
b. “I should consume acidic foods to enhance absorption of this medication.”
c. “I should expect a delay in onset of the drug’s effects after taking the tablet.”
d. “I should take this medication with high-fat foods to improve its action.”
ANS: C
c. “I should expect a delay in onset of the drug’s effects after taking the tablet.”
Enteric-coated tablets resist disintegration in the acidic environment of the stomach and disintegrate when they reach the small intestine. There is usually some delay in onset of actions after taking these medications. Enteric-coated tablets should not be crushed or chewed, which would alter the time and location of absorption. Acidic foods will not enhance the absorption of the medication. The patient should not to eat high-fat food before ingesting an enteric-coated tablet, because high-fat foods decrease the absorption rate.
- A patient who is newly diagnosed with type 1 diabetes mellitus asks why insulin must be given by subcutaneous injection instead of by mouth. The nurse will explain that this is because
a. absorption is diminished by the first-pass effects in the liver.
b. absorption is faster when insulin is given subcutaneously.
c. digestive enzymes in the gastrointestinal tract prevent absorption.
d. the oral form is less predictable with more adverse effects.
ANS: C
c. digestive enzymes in the gastrointestinal tract prevent absorption
Insulin, growth hormones, and other protein-based drugs are destroyed in the small intestine by digestive enzymes and must be given parenterally. Because insulin is destroyed by digestive enzymes, it would not make it to the liver for metabolism with a first-pass effect. Subcutaneous tissue has fewer blood vessels, so absorption is slower in such tissue. Insulin is given subcutaneously because it is desirable to have it absorb slowly.
- The nurse is preparing to administer an oral medication that is water-soluble. The nurse understands that this drug
a. must be taken on an empty stomach.
b. requires active transport for absorption.
c. should be taken with fatty foods.
d. will readily diffuse into the gastrointestinal tract.
ANS: B
b. requires active transport for absorption.
Water-soluble drugs require a carrier enzyme or protein to pass through the GI membrane.
- A nurse is preparing to administer an oral drug that is best absorbed in an acidic environment. How will the nurse give the drug?
a. On an empty stomach
b. With a full glass of water
c. With food
d. With high-fat food
ANS: C
c. With food
Food can stimulate the production of gastric acid so medications requiring an acidic environment should be given with a meal. High-fat foods are useful for drugs that are lipid soluble.
- The nurse is preparing an injectable drug and wants to administer it for rapid absorption. How will the nurse give this medication?
a. IM into the deltoid muscle
b. IM into the gluteal muscle
c. SubQ into abdominal tissue
d. SubQ into the upper arm
ANS: A
a. IM into the deltoid muscle
Drugs given IM are absorbed faster in muscles that have more blood vessels, such as the deltoid, rather than those with fewer blood vessels, such as the gluteals. Subcutaneous routes are used when absorption needs to be slower and more sustained.
- The nurse is reviewing medication information with a nursing student prior to administering an oral drug and notes that the drug has extensive first-pass effects. Which statement by the student indicates a need for further teaching about this medication?
a. “The first-pass effect means the drug may be absorbed into systemic circulation from the intestinal lumen.”
b. “The first-pass effect means the drug may be changed to an inactive form and excreted.”
c. “The first-pass effect means the drug may be changed to a metabolite, which may be more active than the original.”
d. “The first-pass effect means the drug may be unchanged as it passes through the liver.”
ANS: A
a. “The first-pass effect means the drug may be absorbed into systemic circulation from the intestinal lumen.”
Drugs that undergo first-pass metabolism are absorbed into the portal vein from the intestinal lumen and go through the liver where they are either unchanged or are metabolized to an inactive or a more active form.
- The nurse prepares to change a patient’s medication from an intravenous to an oral form and notes that the oral form is ordered in a higher dose. The nurse understands that this is due to differences in
a. bioavailability.
b. pinocytosis.
c. protein binding.
d. tachyphylaxis.
ANS: A
a. bioavailability.
Oral drugs may have less bioavailability because a lower percentage of the drug reaches the systemic circulation. Pinocytosis refers to the process by which cells carry a solute across a membrane. Protein binding can occur with both routes. Tachyphylaxis describes a rapid decrease in response to drugs that occurs when tolerance develops quickly.
- The nurse is preparing to administer a drug and learns that it binds to protein at a rate of 90%. The patient’s serum albumin level is low. The nurse will observe the patient for
a. decreased drug absorption.
b. decreased drug interactions.
c. decreased drug toxicity.
d. increased drug effects.
ANS: D
d. increased drug effects.
Drugs that are highly protein-bound bind with albumin and other proteins, leaving less free drug in circulation. If a patient has a low albumin, the drug is not bound, and there is more free drug to cause drug effects. There would be increased absorption, increased interactions with other drugs, and increased toxicity.
- The nurse is administering two drugs to a patient and learns that both drugs are highly protein-bound. The nurse may expect
a. decreased bioavailability of both drugs.
b. decreased drug effects.
c. decreased drug interactions.
d. increased risk of adverse effects.
ANS: D
d. increased risk of adverse effects.
Two drugs that are highly protein-bound will compete for protein-binding sites, leaving more free drug in circulation and an increased risk of adverse effects as well as increased bioavailability, increased drug effects, and increased drug interactions.
- A patient has been taking a drug that has a protein-binding effect of 75%. The provider adds a new medication that has a protein-binding effect of 90%. The nurse will expect
a. decreased drug effects of the first drug.
b. decreased therapeutic range of the first drug.
c. increased drug effects of the first drug.
d. increased therapeutic range of the first drug.
ANS: C
c. increased drug effects of the first drug.
Adding another highly protein-bound drug will displace the first drug from protein-binding sites and release more free drug increasing the drug’s effects. This does not alter the therapeutic range, which is the serum level between drug effectiveness and toxicity
- The nurse gives a medication to a patient with a history of liver disease. The nurse will monitor this patient for
a. decreased drug effects.
b. increased drug effects.
c. decreased therapeutic range.
d. increased therapeutic range.
ANS: B
b. increased drug effects.
Liver diseases such as cirrhosis and hepatitis alter drug metabolism by inhibiting the drug-metabolizing enzymes in the liver. When the drug metabolism rate is decreased, excess drug accumulation can occur and lead to toxicity.
- The nurse gives 800 mg of a drug that has a half-life of 8 hours. How much drug will be left in the body in 24 hours if no additional drug is given?
a. None
b. 50 mg
c. 100 mg
d. 200 mg
ANS: C
c. 100 mg
Eight hours after the drug is given, there will be 400 mg left. Eight hours after that (16 hours), there will be 200 mg left. At 24 hours, there will be 100 mg left.
- If a drug has a half-life of 12 hours and is given twice daily starting at 0800 on a Monday, when will a steady state be achieved?
a. 0800 on Tuesday
b. 0800 on Wednesday
c. 0800 on Thursday
d. 0800 on Friday
ANS: B
b. 0800 on Wednesday
Steady-state levels occur at 3 to 5 half-lives. Wednesday at 0800 is 4 half-lives from the original dose.
- The nurse is preparing to administer a drug that is ordered to be given twice daily. The nurse reviews the medication information and learns that the drug has a half-life of 24 hours. What will the nurse do next?
a. Administer the medication as ordered.
b. Contact the provider to discuss daily dosing.
c. Discuss every-other-day dosing with the provider.
d. Hold the medication and notify the provider.
ANS: B
b. Contact the provider to discuss daily dosing.
A drug with a longer half-life should be given at longer intervals to avoid drug toxicity.
- The nurse is caring for a patient who has taken an overdose of aspirin several hours prior. The provider orders sodium bicarbonate to be given. The nurse understands that this drug is given for which purpose?
a. To counter the toxic effects of the aspirin
b. To decrease the half-life of the aspirin
c. To increase the excretion of the aspirin
d. To neutralize the acid of the aspirin
ANS: C
c. To increase the excretion of the aspirin
Aspirin is a weak acid and is more readily excreted in alkaline urine. Sodium bicarbonate alkalizes the urine. It does not act as an antidote to aspirin, decrease the half-life, or neutralize its pH.
- The nurse is preparing to administer a drug that is eliminated through the kidneys. The nurse reviews the patient’s chart and notes that the patient has increased serum creatinine and blood urea nitrogen (BUN). The nurse will perform which action?
a. Administer the drug as ordered.
b. Anticipate a shorter than usual half-life of the drug.
c. Expect decreased drug effects when the drug is given.
d. Notify the provider and discuss giving a lower dose.
ANS: D
d. Notify the provider and discuss giving a lower dose.
Increased creatinine and BUN indicate decreased renal function so a drug that is eliminated through the kidneys can become toxic. The nurse should discuss a lower dose with the provider. The drug will have a longer half-life and will exhibit increased effects with decreased renal function.
- The nurse understands that the length of time needed for a drug to reach the minimum effective concentration (MEC) is the
a. duration of action.
b. onset of action.
c. peak action time.
d. time response curve.
ANS: B
b. onset of action.
The onset of action is the time it takes to reach the MEC. Duration of action is the length of time a drug has a pharmacologic effect. Peak action time occurs when the drug reaches its highest blood level. The time response curve is an evaluation of the other three measures.
- The nurse administers albuterol to a patient who has asthma. The albuterol acts by stimulating beta2-adrenergic receptors to cause bronchodilation. The nurse understands that albuterol is a beta-adrenergic
a. agonist.
b. antagonist.
c. inhibitor.
d. depressant.
ANS: A
a. agonist.
An agonist medication is one that stimulates a certain type of cell to produce a response.
- The nurse is explaining to the patient why a nonspecific drug has so many side effects. Which statement by the patient indicates a need for further teaching?
a. “Nonspecific drugs can affect specific receptor types in different body tissues.”
b. “Nonspecific drugs can affect a variety of receptor types in similar body tissues.”
c. “Nonspecific drugs can affect hormone secretion as well as cellular functions.”
d. “Nonspecific drugs require higher doses than specific drugs to be effective.”
ANS: D
d. “Nonspecific drugs require higher doses than specific drugs to be effective.”
Nonspecific drugs can act on one type of receptor but in different body tissues, or a variety of receptor types, or act on hormones to produce effects. Nonspecific drugs do not require higher doses.
- The nurse is preparing to give a dose of gentamicin to a patient and notes that the most recent serum gentamicin trough level was 2 mcg/mL. What will the nurse do next?
a. Administer the drug as ordered.
b. Administer the drug and monitor for adverse effects.
c. Notify the provider to discuss decreasing the dose.
d. Notify the provider to report a toxic drug level.
ANS: D
d. Notify the provider to report a toxic drug level.
The trough drug level for gentamicin should be less than 2 mcg/mL. The nurse should not administer the drug and should notify the provider of the toxic level.
- The nurse is preparing to administer the first dose of digoxin (Lanoxin) to a patient and notes that the dose ordered is much higher than the usual recommended dose. Which action will the nurse perform?
a. Administer the dose as ordered.
b. Give the dose and monitor for toxicity.
c. Hold the dose until reviewing it with the provider.
d. Refuse to give the dose.
ANS: A
a. Administer the dose as ordered.
Digoxin requires a loading dose when first prescribed.
- The nurse administers a narcotic analgesic to a patient who has been receiving it for 1 day after orthopedic surgery. The patient reports no change in pain 30 minutes after the medication is given. The nurse recognizes that this patient is exhibiting
a. drug-seeking behavior.
b. drug tolerance.
c. the placebo effect.
d. tachyphylaxis.
ANS: D
d. tachyphylaxis.
Tachyphylaxis is a rapid decrease in response, or acute tolerance. Tolerance to drug effects can occur with narcotics, requiring increased doses in order to achieve adequate drug effects. Nurses often mistake drug-seeking behavior for drug tolerance. The placebo effect occurs when the patient experiences a response with an inactive drug.
- The nurse is performing a pain assessment on a patient of Asian descent. The patient does not describe the pain when asked to do so and looks away from the nurse. What will the nurse do next?
a. Ask the patient’s family member to evaluate the patient’s pain.
b. Conclude that the patient’s pain is minimal.
c. Evaluate the patient’s non-verbal pain cues.
d. Suspect that the patient is experiencing severe pain.
ANS: C
c. Evaluate the patient’s non-verbal pain cues.
Patients of Asian descent might speak in soft tones and avoid direct eye contact while being comfortable with long silences. It is not correct to ask family members to evaluate pain. Without assessment of non-verbal cues, the nurse cannot determine whether the pain is minimal or severe.
- The nurse is preparing to discuss long-term care needs with a patient newly diagnosed with a chronic disease. The patient is of Latin American descent. The nurse will plan to take which action when teaching this patient?
a. Discussing long-term outcomes associated with compliance of the prescribed regimen
b. Highlighting various traditional healing practices that will not be effective for this patient’s care
c. Providing factual information and answering all questions as they arise
d. Providing teaching in increments, allowing periods of silence to allow assimilation of information
ANS: C
c. Providing factual information and answering all questions as they arise
The nurse should provide factual information and answer questions. Persons of Latin American descent have less dependence on time schedules and do not tend to have a future orientation. They are not comfortable with periods of silence. Nurses should be receptive to traditional healing practices and seek ways to include those in care when they do not hinder safe and effective care; highlighting practices that won’t work may convey a lack of respect for these traditions.
- A Native American patient has just been diagnosed with diabetes mellitus. The nurse preparing a teaching plan for this patient understands that which aspect of the disease and disease management may be most difficult for this patient?
a. Body image changes
b. Management of meal and medication schedules
c. Perception of the disease as punishment from God
d. The sense of dependence on others
ANS: B
b. Management of meal and medication schedules
Non-European cultural groups such as those of Native American descent have less dependence on time schedules. Disease management will likely focus more on present concerns about alleviating current discomfort and less on measures to promote long-term wellness or treat a chronic illness.
- A patient who is of Filipino descent is admitted to the hospital. The nurse goes to the room to start intravenous fluids and to perform an admission assessment and finds several family members in the room. Which action by the nurse is appropriate?
a. Ask the family to wait in the hallway until the admission tasks are completed.
b. Determine which family member is the family patriarch and address questions to him.
c. Invite family members to assist with appropriate tasks during the admission process.
d. Provide chairs for family members and ask them to stay seated during the admission.
ANS: C
c. Invite family members to assist with appropriate tasks during the admission process.
In general, the Filipino culture expects that family members will stay at a patient’s bedside and participate in his or her care. The nurse should include the family in appropriate tasks. It is not correct to ask the family to wait in the hall or to sit in chairs and not participate. Filipino families do not necessarily depend on family patriarchs.
- The nurse is caring for a patient who is a member of the local Native American community. The patient is refusing medications and treatments in spite of repeated attempts to explain the importance of these interventions. Which is an appropriate nursing action?
a. Ask a family member about traditional healing practices that might be better accepted.
b. Enlist the help of a family member to explain the need for the medications and treatments.
c. Find a hospital staff member who is Native American to help provide teaching for this patient.
d. Suggest a Social Work consult to the patient’s provider.
ANS: A
a. Ask a family member about traditional healing practices that might be better accepted.
Members of some cultures may use traditional healers, and this should be accommodated whenever possible. Showing respect for this patient’s culture will help to establish trust and thus greater cooperation. It is important for the nurse not to make generalizations within and among cultural groups, so asking a family member to describe what this particular patient needs is the better choice. Finding a hospital staff member who is Native American assumes that all Native Americans have the same practices. Deferring to a Social Worker is not necessary. Enlisting a family member to explain the need for the medications is just another way of imposing treatments on this person without respecting their cultural needs.
- The nurse is caring for an African-American patient who appears to understand instructions for self-care but does not carry out basic self-care tasks. The nurse understands that the patient may
a. be poorly educated and lack basic comprehension skills.
b. need more time and personal space to assimilate what is taught.
c. require the use of culturally appropriate words and phrases when teaching.
d. view illness as punishment and lack desire to change the outcome.
ANS: C
c. require the use of culturally appropriate words and phrases when teaching.
African Americans may use a common style of speaking. This vernacular English may be quite different in some cases from standard English, so if things are misunderstood, it is possible that vernacular terminology may need to be used. This vernacular English does not mean that patients are poorly educated or uncommunicative. African Americans do not tend to need more space and do not necessarily view illness as punishment.
- The nurse notes that a patient of African American descent who is taking an oral antihypertensive medication continues to have elevated blood pressure three months after beginning the medication regimen. The nurse suspects that the patient may be
a. consuming ethnic foods that interfere with absorption of the drug.
b. discarding the medication.
c. experiencing allergic reactions to the medication.
d. metabolizing the drug differently than expected.
ANS: D
d. metabolizing the drug differently than expected.
Certain classifications of medications have different effects in individuals whose genetic markers are predominantly characteristic of a certain biologic group. African Americans respond poorly to several classes of antihypertensive agents.
- The nurse is caring for a postoperative patient who is of Asian descent. The patient reports little relief from pain even while taking an opioid analgesic containing codeine and acetaminophen. What does the nurse suspect that this patient is exhibiting?
a. Drug-seeking behavior
b. Heightened pain perception
c. Poor understanding of expected drug effects
d. Rapid metabolism of one of the drug’s components
ANS: D
d. Rapid metabolism of one of the drug’s components
Certain classifications of medications have different effects in individuals whose genetic markers are predominantly characteristic of a certain biologic group. Persons of Asian descent may have a decreased response to some drugs because they are more likely to have higher levels of CYP2D6 enzymes.
- The nurse is caring for an African-American patient who is taking warfarin (Coumadin) to prevent blood clots. The nurse will monitor this patient carefully for which effect?
a. Decreased therapeutic effects
b. Heightened risk for hemorrhage
c. Increased risk of hypersensitivity
d. Potential risk of paradoxical effects
ANS: A
a. Decreased therapeutic effects
Certain classifications of medications have different effects in individuals whose genetic markers are predominantly characteristic of a certain biologic group. African-American patients will tend to have a decreased therapeutic effect from warfarin (Coumadin).
- A patient has been taking a drug for several years and tells the nurse it is no longer working. The nurse learns that the patient has recently begun taking an over-the-counter antacid medication. What does the nurse suspect is occurring?
a. An adverse drug reaction
b. A drug interaction
c. Drug incompatibility
d. Drug tolerance
ANS: B
b. A drug interaction
Drug interactions are an altered or modified action or effect of a drug as a result of interaction with one or more other drugs. An adverse drug reaction can occur with one or more drugs and has effects ranging from mild to severe toxicity. Drug incompatibility is a chemical reaction of two or more drugs that occurs in vitro. Drug tolerance is the development of reduced response to a medication over time.
- The nurse is preparing to administer two intravenous medications that should not be given using the same IV tubing. The nurse understands that this is because of drug
a. adverse reactions.
b. incompatibility.
c. interactions.
d. potentiation.
ANS: B
b. incompatibility.
Drugs that are incompatible cannot be mixed together in solution and cannot be mixed in a syringe, IV bag, or other artificial environment. Adverse reactions are symptoms occurring from drug effects. Drug interactions occur in vivo. Potentiation is when one drug causes an enhanced response in another drug.
- The nurse is teaching a patient who will begin taking ciprofloxacin. What instruction will the nurse include when teaching this patient about this drug?
a. “Do not take this medication with oral contraceptive pills.”
b. “Take at least 1 hour after or 2 hours before taking antacids.”
c. “Take in the morning with your multivitamin tablet.”
d. “Take with milk to reduce gastric upset.”
ANS: B
b. “Take at least 1 hour after or 2 hours before taking antacids.”
Dairy products, multivitamins, and antacids should be avoided 1 hour before and 2 hours after taking ciprofloxacin because these products contain divalent cations that form a drug complex that prevents absorption of the ciprofloxacin.
- A patient who takes a drug that undergoes gastric absorption will begin taking an opioid analgesic after sustaining an injury in a motor vehicle accident. The nurse will observe the patient closely for which effects?
a. Decreased effects of the first drug
b. Increased effects of the first drug
c. Decreased effects of the narcotic
d. Increased effects of the narcotic
ANS: B
b. Increased effects of the first drug
Opioids slow gastric emptying, allowing more time for drugs absorbed in the stomach to be absorbed. The nurse should expect increased effects of the first drug.
- The nurse is preparing to administer erythromycin to a patient who takes digoxin. The nurse will plan to monitor the patient for
a. digoxin toxicity.
b. decreased digoxin effects.
c. erythromycin toxicity.
d. decreased erythromycin effects.
ANS: A
a. digoxin toxicity
Intestinal flora have the ability to metabolize digoxin, and any drug that destroys or inhibits growth of these gastrointestinal microflora can increase digoxin levels leading to toxicity.
- A young adult female patient who takes a combination oral contraceptive (OCP) will begin taking an antibiotic. When teaching the patient about this medication, the nurse will
a. recommend using a backup method of contraception.
b. suggest that she switch to an injectable form of contraception.
c. tell her that the antibiotic is less effective if she is taking OCPs.
d. tell her the antibiotic has a greater risk for toxicity while taking OCPs.
ANS: A
a. recommend using a backup method of contraception.
Gut bacteria are necessary to hydrolyze estrogen conjugates into free estrogens. Concurrent antibiotic administration can alter these bacteria and prevent the optimal absorption and effectiveness of OCPs. A backup contraceptive method is recommended.
- A patient has been taking warfarin (Coumadin), which is highly protein-bound. The patient will begin taking gemfibrozil, which is also highly protein-bound. The nurse will observe the patient closely for
a. decreased effects of warfarin.
b. increased effects of warfarin.
c. decreased effects of gemfibrozil.
d. decreased effects of both drugs.
ANS: B
b. increased effects of warfarin.
The addition of a highly protein-bound drug will compete with warfarin for protein- binding sites, releasing more free warfarin into the system, increasing drug effects and increasing the chance of toxicity.
- A patient is taking phenytoin to prevent seizures. The nurse knows that phenytoin is highly protein-bound and has sedative side effects. The nurse reviews the patient’s chart and notes a low serum albumin. The nurse will notify the provider and observe the patient for which effects?
a. Decreased sedative effects
b. Increased sedative effects
c. Increased seizures
d. No change in effects
ANS: B
b. Increased sedative effects
Phenytoin is protein-bound. When patients have a low serum albumin, there are fewer protein-binding sites, leaving more free drug in the system. The nurse should expect an increase in sedative side effects.
- A patient who takes the anticoagulant warfarin will begin taking the anticonvulsant drug carbamazepine. The nurse reviews the drug information for these drugs and learns that carbamazepine is a hepatic enzyme inducer. The nurse anticipates that the provider will make which dosage adjustment?
a. Decrease the dose of carbamazepine
b. Increase the dose of carbamazepine
c. Decrease the dose of warfarin
d. Increase the dose of warfarin
ANS: D
d. Increase the dose of warfarin
Carbamazepine is a hepatic enzyme inducer, which can increase drug metabolism. Patients taking both drugs usually need a larger dose of warfarin.
- The nurse is caring for a patient who receives theophylline, which has a narrow therapeutic index. The patient has been receiving cimetidine but will stop taking that drug in 2 days. In 2 days, the nurse will observe the patient closely for
a. decreased effectiveness of theophylline.
b. increased effectiveness of theophylline.
c. decreased toxicity of theophylline.
d. prolonged effectiveness of theophylline.
ANS: B
b. increased effectiveness of theophylline.
Cimetidine is an enzyme inhibitor that decreases the metabolism of drugs such as theophylline. If the cimetidine is discontinued, the theophylline dose should be decreased to avoid toxicity. The nurse should observe the patient for increased theophylline effects.
- The nurse is caring for a patient who takes digoxin to treat heart failure. The provider orders furosemide to treat edema. The nurse will monitor the patient for digitalis toxicity because of
a. adverse drug reactions caused by giving these drugs in combination.
b. altered hepatic blood flow caused by the furosemide.
c. changes in reabsorption of water and electrolytes in the kidneys.
d. additive effects of these two drugs given together.
ANS: C
c. changes in reabsorption of water and electrolytes in the kidneys.
Diuretics such as furosemide promote water and sodium excretion from the renal tubules, especially sodium and potassium. Hypokalemia can result, and this will enhance the action of digoxin, and digitalis toxicity can occur.
- A patient will receive penicillin to treat an infection. The provider orders probenecid (Probalan), a medication to treat gout, even though the patient does not have gout. Which action by the nurse is correct?
a. Administer the drug since the provider ordered it.
b. Recognize that it is being given prophylactically.
c. Refuse to administer the medication since it is not indicated.
d. Verify that it is being given for its secondary action.
ANS: D
d. Verify that it is being given for its secondary action.
Two or more drugs with the same route of excretion may compete with each other for elimination. Probenecid is given because it inhibits the excretion of penicillin, which may be desirable when the provider wants to prolong the plasma concentration of penicillin. The nurse should always verify an order that may not be clear.
- The nurse is preparing to administer meperidine (Demerol), which is an opioid analgesic, and promethazine (Phenergan), which is an antiemetic and antihistamine. The nurse understands that these drugs are given in combination for which reason?
a. They have antagonistic effects to reduce nausea.
b. They have additive effects to enhance analgesia.
c. They have potentiating effects to decrease an allergic response.
d. They have synergistic effects to increase sedation.
ANS: D
d. They have synergistic effects to increase sedation.
Meperidine and promethazine have a synergistic effect on each other with a clinical effect that is substantially greater than the combined effect of the two.
- The provider has ordered amoxicillin with clavulanate (Augmentin) for a child who has otitis media. The child’s parent asks why this drug is necessary when amoxicillin is less expensive. The nurse will explain that clavulanate is added to amoxicillin because it
a. binds with albumin to increase the amount of available amoxicillin.
b. broadens the spectrum of amoxicillin by inhibiting bacterial enzymes.
c. inhibits hepatic blood flow, leading to increased serum drug levels of amoxicillin.
d. inhibits the excretion of amoxicillin by interfering with renal function.
ANS: B
b. broadens the spectrum of amoxicillin by inhibiting bacterial enzymes.
Clavulanate is a bacterial enzyme inhibitor, specifically beta-lactamase, which inactivates amoxicillin. When added to amoxicillin, it broadens the antibacterial spectrum.
- The nurse assesses a patient who is receiving morphine sulfate intravenously using a patient-controlled analgesia pump. The nurse notes somnolence and respiratory depression, which are signs of morphine toxicity. The nurse will prepare to administer naloxone (Narcan) because it
a. has synergistic effects with morphine.
b. is a narcotic agonist.
c. is a narcotic antagonist.
d. potentiates narcotic effects.
ANS: C
c. is a narcotic antagonist.
Naloxone is a narcotic antagonist, meaning that it reverses the effects of morphine by blocking morphine receptor sites.
- The nurse is teaching a patient about a drug that causes photosensitivity. Which statement by the patient indicates a need for further teaching?
a. “I should apply sunscreen with a sun protection factor greater than 15.”
b. “I should avoid sunlight when possible while taking this drug.”
c. “I will wear protective clothing when I am outdoors.”
d. “I will wear sunglasses even while I am indoors.”
ANS: D
d. “I will wear sunglasses even while I am indoors.”
Drugs that cause photosensitivity make sunburn more likely, so patients should stay out of the sun, wear protective clothing, and use sunscreen with an SPF greater than 15. It is not necessary to wear sunglasses indoors.
- A patient asks the nurse about using over-the-counter (OTC) medications. The nurse will tell the patient that OTC medications
a. are not as effective as prescription medications.
b. are not as safe as prescription medications.
c. have fewer side effects and drug interactions than prescription medications.
d. should be included when listing any medications taken by the patient.
ANS: D
d. should be included when listing any medications taken by the patient.
OTC medications should always be included when listing medications because they can cause drug interactions. OTC medications can be as effective and as safe as prescription medications and have as many side effects and adverse reactions.
- A patient who takes warfarin (Coumadin) asks the nurse about taking a medication for headaches. The nurse will recommend which medication?
a. Acetaminophen
b. Aspirin
c. Ibuprofen
d. No medication
ANS: A
a. Acetaminophen
Aspirin and NSAIDs can increase the risk of hemorrhage in patients taking anticoagulants. Acetaminophen is safe and may be recommended.
- The nurse is educating the parent of a 20-month-old toddler about over-the-counter (OTC) products to treat cold symptoms. Which statement by the parent indicates understanding of the teaching?
a. “I should check with the provider for proper dosing instructions.”
b. “OTC medications are less potent and have minimal side effects.”
c. “OTC medications can be given to children younger than 2 years old.”
d. “Using OTC medications may prevent accurate diagnosis of respiratory illness.”
ANS: D
d. “Using OTC medications may prevent accurate diagnosis of respiratory illness.”
OTC cold medications can mask symptoms and prevent accurate diagnosis of potentially serious illnesses. Their use in children is not recommended.
- Which patients are at high risk for drug interactions? (Select all that apply.)
a. Patients who are acutely ill
b. Patients who are taking multiple medications
c. Patients who see several specialists
d. Patients who take supplements and OTC medications
e. Patients who use one pharmacy for several medications
ANS: B, C, D
b. Patients who are taking multiple medications
c. Patients who see several specialists
d. Patients who take supplements and OTC medications
Patients who have chronic health conditions, take multiple medications, see more than one provider, and use supplements and OTC medications are at higher risk for drug interactions.
- The nurse is preparing to administer a medication to a 6-month-old infant. The nurse will monitor closely for signs of drug toxicity based on the knowledge that, compared to adults, infants have
a. an increased percentage of total body fat.
b. immature hepatic and renal function.
c. more protein receptor sites.
d. more rapid gastrointestinal transit time.
ANS: B
b. immature hepatic and renal function.
The liver and kidneys are the primary organs for metabolism and excretion and are immature in infants. This allows drugs to accumulate and increases the risk for drug toxicity. Infants have a lower proportion of body fat than adults and fewer protein receptors. They do have more rapid gastrointestinal transit time, but this decreases the amount of drug absorbed.
- The nurse reviews information about a drug and learns that it is best absorbed in an acidic environment. When giving this drug to a 1-year-old patient, the nurse will expect to administer a dose that will be
a. equal to an adult dose.
b. less than an adult dose.
c. more than an adult dose.
d. twice the usual adult dose.
ANS: C
c. more than an adult dose.
Because the child’s gastric pH is more alkaline than the adult’s, less drug will be absorbed. Therefore, the dose should be increased.
- The nurse assumes care for an infant who is showing signs of drug toxicity to a drug given several hours prior. The nurse checks the dose and confirms that the dose is consistent with standard dosing guidelines. Which characteristic of the drug will likely explain this response in this patient?
a. It is acidic.
b. It is highly protein-bound.
c. It is not fat-soluble.
d. It is water-soluble.
ANS: B
b. It is highly protein-bound.
With fewer protein-binding sites, there is more active drug available. This requires a reduction in the dose for infants. Drugs that are acidic are not as readily absorbed in infants, since their gastric pH tends to be more alkaline. Infants have a lower proportion of body fat; fat-soluble drugs would need to be decreased to prevent toxicity. Until about age 2 years of age, pediatric patients require larger than usual doses of water-soluble drugs to achieve therapeutic effects.
- The parent is concerned about giving a child medication because of the lack of knowledge about the effects of drugs on children. The nurse discusses legislation passed in 2002 and 2003 about pediatric pharmacology. Which is true about these laws?
a. They forbid providers from prescribing medications unless they have been FDA- approved for use in children.
b. They mandate consistent, evidence-based dosing guidelines for use in children.
c. They provide federal grants to fund pediatric pharmaceutical research.
d. They require drug manufacturers to study pediatric medication use.
ANS: D
d. They require drug manufacturers to study pediatric medication use.
In 2003, a law known as the Pediatric Research Equity Act joined the Best Pharmaceuticals Act of 2002 to require drug manufacturers to study pediatric medication use and offer incentives for pediatric pharmacology research. Providers are not forbidden to prescribe drugs in children that are not FDA-approved. The laws do not mandate the use of evidence-based guidelines and do not provide grants to fund research.
- The nurse will administer an intravenous medication to an adolescent patient. When preparing the adolescent for the IV insertion, which is an appropriate action by the nurse?
a. Allowing the patient to verbalize concerns about the procedure
b. Covering the insertion site with a bandage after the procedure is completed
c. Explaining any possible adverse drug reactions
d. Reassuring the patient that only one body part will be used
ANS: A
a. Allowing the patient to verbalize concerns about the procedure
Allowing the adolescent to verbalize concerns about the medication and its regimen may offer opportunities to clarify misconceptions and teach new information. Preschool-age children may have concerns about harm to their body and need to have sites covered. Adolescents still have a present focus, so discussing future adverse reactions is not especially helpful. Preschool and school-age children fear bodily harm and require reassurance that only one body part will be affected.