An adult patient is about to receive intravenous (IV) ondansetron during a chemotherapy treatment. A dose of 0.15 mg/kg IV 30 minutes before chemotherapy is ordered. The patient weighs 165 pounds. The medication is supplied in a vial marked 2 mg/mL for IV administration. Identify how many milliliters the nurse will administer for this dose. (Record answer to one decimal place.)
Correct Answer: 5.7 mL
Rationale: Convert pounds to kilograms: 165 ?· 2.2 = 75 kg. Calculate milligrams per dose: 0.15 mg/kg ?? 75 kg = 11.25 mg, rounded to 11.3 mg/dose. Calculate milliliters to be given: 2 mg:1 mL::11.3 mg:x mL, (2 ?? x) = (1 ?? 11.3); 2x = 11.3, x = 5.65, which rounds to 5.7 mL.
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- A. Go ahead and give him the ipecac, and then call 911.
- B. Don't give him the ipecac. Call the Poison Control number immediately for instructions.
- C. Please come to the office right away so that we can check him.
- D. Go ahead and take him to the emergency room right now.
Correct Answer: B
Rationale: The American Academy of Pediatrics no longer recommends the use of syrup of ipecac for home treatment for poisoning. In all cases of poisoning, if the victim is conscious and alert, call the local poison control center. If the victim has collapsed or stopped breathing, call 911 for emergency transport to a hospital.
A patient on chemotherapy is using ondansetron for treatment of nausea. The nurse will instruct the patient to watch for which adverse effect of this drug?
- A. Dizziness
- B. Diarrhea
- C. Dry mouth
- D. Blurred vision
Correct Answer: B
Rationale: Diarrhea is an adverse effect of the serotonin blockers. The other adverse effects listed may occur with anticholinergic drugs.
A patient is receiving a tube feeding through a gastrostomy. The nurse expects that which type of drug will be used to promote gastric emptying for this patient?
- A. Prokinetic drugs, such as metoclopramide
- B. Serotonin blockers, such as ondansetron
- C. Anticholinergic drugs, such as scopolamine
- D. Neuroleptic drugs, such as chlorpromazine
Correct Answer: A
Rationale: Prokinetic drugs promote the movement of substances through the gastrointestinal tract and increase gastrointestinal motility.
A patient with motion sickness is planning a cross-country car trip and has a new prescription for a scopolamine transdermal patch. The nurse provides teaching for the use of this patch medication. The patient shows a correct understanding of the teaching with which statement?
- A. I will change the patch every day.
- B. I will change the patch every other day.
- C. I will change the patch every 3 days.
- D. I will remove the patch only if it stops working.
Correct Answer: C
Rationale: Scopolamine patches are 72-hour doses and therefore are changed every 3 days.
A patient who has been newly diagnosed with vertigo will be taking an antihistamine antiemetic drug. The nurse will include which information when teaching the patient about this drug?
- A. The patient may skip doses if the patient is feeling well.
- B. The patient will need to avoid driving because of possible drowsiness.
- C. The patient may experience occasional problems with taste.
- D. It is safe to take the medication with a glass of wine in the evening to help settle the stomach.
Correct Answer: B
Rationale: Drowsiness may occur because of central nervous system (CNS) depression, and patients should avoid driving or working with heavy machinery because of possible sedation. These drugs must not be taken with alcohol or other CNS depressants because of possible additive depressant effects. The medication should be taken as instructed and not skipped unless instructed to do so.
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