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NURS 6650 MIDTERM EXAM WITH ANSWERS (2020) | ALREADY GRADED A
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PHARMACOLOGY MIDTERMPharm Midterm exam EXAM LATEST
• A patient who takes daily doses of aspirin is scheduled for surgery next week. The nurse should advise the
patient to:
• continue to use aspirin as scheduled.
• reduce the aspirin dosage by
half until after surgery.c. stop
using aspirin immediately.
d. stop using aspirin 3 days before surgery.
C
Aspirin must be withdrawn at least 1 week before surgery. Aspirin cannot be continued as scheduled, because
the risk for bleeding is too great. An interval of 3 days is not long enough for the bleeding effects of aspirin to be
reversed. Cutting the dose in half would not reduce the effects of bleeding associated with aspirin use.
• A patient who takes aspirin for rheumatoid arthritis is admitted to the hospital complaining of
headache and ringing in the ears. The plasma salicylate level is 300 mcg/mL, and the urine pH is 6.0. What
will the nurse do?
• Increase the aspirin dose to treat the patient's headache.
• Notify the provider of possible renal toxicity.
• Prepare to provide respiratory support, because the patient
shows signs of overdose. d. Withhold the aspirin until the patient's
symptoms have subsided.
D
This patient shows signs of salicylism, which occurs when ASA levels climb just slightly above the therapeutic
level. Salicylism is characterized by tinnitus, sweating, headache, and dizziness. Tinnitus is an indication that the
maximum acceptable dose has been achieved. Toxicity occurs at a salicylate level of 400 mcg/mL or higher. ASA
should be withheld until the symptoms subside and then should be resumed at a lower dose. Increasing the
dose would only increase the risk of toxicity. Signs of renal impairment include oliguria and weight gain, which
are not present in this patient. This patient has salicylism, not salicylate toxicity, so respiratory support
measures are not indicated.
• A pregnant patient asks the nurse if she can take antihistamines for seasonal allergies during her
pregnancy. What will the nurse tell the patient?
• Antihistamines should be avoided unless absolutely necessary.
• Second-generation antihistamines are safer than first-generation antihistamines.
• Antihistamines should not be taken during pregnancy but may be taken when breast-feeding.
• The margin of safety for antihistamines is clearly understood for pregnant patients.
A
Antihistamines are pregnancy Category C, with debate currently occurring regarding degree of effects on the
fetus. They should be avoided unless absolutely necessary. All antihistamines have adverse effects on the fetus.
Antihistamines can be excreted in breast milk. The margin of safety of antihistamines in pregnancy is not clear, so
these agents should be avoided unless a clear benefit of treatment outweighs any risks
,• A 5-year-old child with seasonal allergies has been taking 2.5 mL of cetirizine [Zyrtec] syrup once daily.
The parents tell the nurse that the child does not like the syrup, and they do not think that the drug is
effective. The nurse will suggest they discuss which drug with their child's healthcare provider?
• Cetirizine [Zyrtec] 5-mg chewable tablet once daily
• Loratadine [Claritin] 10-mg chewable tablet once daily
• Fexofenadine [Allegra] syrup 5 mL twice daily
• Desloratadine [Clarinex] 5-mg rapid-disintegrating tablet once daily
A
The child is receiving a low dose of cetirizine and can receive up to 5 mg per day in either a single dose or two
divided doses. Cetirizine is available in a chewable tablet, which this child may tolerate better, so the parents
should be encouraged to explore thisoption with their provider. The loratadine 10-mg chewable tablet is
approved for children 6 years and older. Fexofenadine would be safe for this child, but it is unlikely that the
syrup would be any better than the cetirizine syrup. Desloratadine is not approved for children under the age of
12 years.
• A 1-year-old child is scheduled to receive the MMR vaccine, pneumococcal vaccine (PCV), Varivax, and
hepatitis A vaccine. The child's parents request that the MMR vaccine not be given, saying that, even though
there is no demonstrated link with autism, they are still concerned about toxic levels of mercury in the
vaccine. Which response by the nurse is correct?
• "Most U.S.-made vaccines have zero to low amounts of mercury."
• "Other vaccine preparations contain mercury as well."
• "Thimerosal is a nontoxic form of mercury."
• "You can get more mercury from breast milk and many foods on the market."
A
Because of concerns about mercury levels, most U.S.-made vaccines contain either zero or very low amounts of
mercury. Some multidose vials of flu vaccine still contain thimerosal, but even that is a very low amount. Telling
parents that other vaccines contain mercury will increase their suspicion about vaccines and further reduce their
trust. Thimerosal is a mercury-based preservative andthus has the same toxicity as mercury. Although it is true
that mercury is found in breast milk and other foods, telling parents this belittles their concerns about the
vaccines.
• A patient with moderate to severe chronic pain has been taking oxycodone [OxyContin] 60 mg every 6
hours PRN for several months and tells the nurse that the medication is not as effective as before. The
patient asks if something stronger can be taken. The nurse will contact the provider to discuss:
a. administering a combination opioid
analgesic/acetaminophen preparation. b. changing the
medication to a continued-release preparation.
c. confronting the patient about drug-seeking behaviors.
d. withdrawing the medication, because physical dependence has occurred.
B
Oxycodone is useful for moderate to severe pain, and a continued-release preparation may give more
continuous relief. Dosing is every 12 hours, not PRN. A combination product is not recommended with
increasing pain, because the nonopioid portion of the medication cannot be increased indefinitely. This patient
does not demonstrate drug-seeking behaviors. Physical dependence is not an indication for withdrawing an
,opioid, as long as it is still needed; it indicates a need for withdrawing the drug slowly when the drug is
discontinued.
• A patient will receive buprenorphine [Butrans] as a transdermal patch for pain. What is important to
teach this patient about the use of this drug?
• Avoid prolonged exposure to the sun.
• Cleanse the site with soap or alcohol.
• Remove the patch daily at bedtime.
• Remove hair by shaving before applying the patch.
A
Patients using the buprenorphine transdermal patch should be cautioned against heat, heating pads, hot baths,
saunas, and prolonged sun exposure. The skin should be cleaned with water only. The patch should stay on for 7
days before a new patch is applied. Patients should remove hair by clipping, not shaving.
• A patient has been taking methadone [Dolophine] for 5 months to overcome an opioid addiction. The
nurse should monitor the patient for which of the following electrocardiographic changes?
• Prolonged QT interval
• Prolonged P-R interval
• AV block
• An elevated QRS complex
A
Methadone prolongs the QT interval. It does not prolong the P-R interval, cause AV block, or produce an elevated
QRS complex.
• A patient taking fluoxetine [Prozac] complains of decreased sexual interest. A prescriber orders a
"drug holiday." What teaching by the nurse would best describe a drug holiday?
• "Cut the tablet in half anytime to reduce the dosage."
• "Discontinue the drug for 1 week."
• "Don't take the medication on Friday and Saturday."
• "Take the drug every other day."
C
Sexual dysfunction may be managed by having the patient take a drug holiday, which involves discontinuing
medication on Fridays and Saturdays. Cutting the tablet in half anytime to reduce the dosage is an inappropriate
way to manage drug administration effectively. In addition, it does not describe a drug holiday. The patient
should not take the drug every other day, nor should it be discontinued for a week at a time, because this would
diminish the therapeutic levels of the drug, thereby minimizing the therapeutic effects. In addition, neither of
those options describe a drug holiday.
• A patient is diagnosed with major depression with severe symptoms and begins taking an
antidepressant medication. Three weeks after beginning therapy, the patient tells the nurse that the drug is
not working. The nurse will counsel this patient to ask the provider about:
• adding a second medication to complement this drug.
• changing the medication to one in a different drug class.
• increasing the dose of this medication.
• using nondrug therapies to augment the medication.
D
, Patients with severe depression benefit more from a combination of drug therapy and psychotherapy than
from either componentalone, so this patient should ask the provider about nondrug therapies. Once a drug has
been selected for treatment, it must be used for 4 to 8 weeks before its efficacy can be assessed. Until a drug
has been used at least 1 month without success, it should not be considered a failure. Adding a second
medication, changing to a different medication, and increasing the dose of this medication should all be
reserved until the current drug is deemed to have failed after at least 4 weeks.
• A young adult patient has been taking an antidepressant medication for several weeks and reports
having increased thoughts of suicide. The nurse questions further and learns that the patient has
attempted suicide more than once in the past. The patient identifies a concrete plan for committing
suicide. The nurse will contact the provider to discuss:
• changing the medication to another drug class.
• discontinuing the medication immediately.
• hospitalizing the patient for closer monitoring.
• requiring more frequent clinic visits for this patient.
C
Patients with depression often think of suicide, and during treatment with antidepressants, these thoughts often
increase for a time. Patients whose risk of suicide is especially high should be hospitalized. All antidepressants
carry this risk, so changing medication is not recommended. Discontinuing the medication is not recommended.
More frequent clinic visits are recommended for patients with a low to moderate risk of suicide.
• A patient who has been taking a monoamine oxidase inhibitor (MAOI) for depression for several
months tells the provider that the medication has not helped with symptoms. The provider plans to switch
the patient to an SSRI. The nurse will teach this patient to:
• start taking the SSRI and stop the MAOI when symptoms improve.
• start taking the SSRI and then gradually withdraw the MAOI.
• stop taking the MAOI and wait 5 weeks
before starting the SSRI. d. stop taking the
MAOI 2 weeks before starting the SSRI.
D
MAOIs increase 5-HT availability, thus greatly increasing the risk of serotonin syndrome. MAOIs should be
withdrawn at least 14 days before an SSRI is started. An SSRI should never be given at the same time as an MAOI.
It is not necessary to wait 5 weeks before starting an SSRI.
• A nurse provides teaching for a patient who is newly diagnosed with Parkinson's disease. Which
statement by the patient indicates understanding of the drug therapy for this disease?
• "A levodopa/carbidopa combination is used to improve motor function."
• "There are several drugs available to treat dyskinesias."
• "When 'off' times occur, I may need to increase my dose of levodopa."
• "With adequate drug therapy, the disease progression may be slowed."
A
Levodopa combined with carbidopa is the initial drug of choice to treat motor symptoms. Amantadine is the
only drug recommended to treat dyskinesias. Entacapone and rasagiline are used to treat abrupt loss of effect,
or "off" times. Drug therapy does not slow the progression of the disease.
• A hospitalized patient with Parkinson's disease who is receiving apomorphine to treat "off" episodes
develops nausea and vomiting. The nurse will discuss the use of which medication with the patient's
provider?
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