HESI RN
Pharmacology HESI
1. Sildenafil (Viagra) is prescribed to treat a client with erectile dysfunction. A nurse reviews the client's medical record and would question the prescription if which of the following is noted in the client's history?
- A. Neuralgia
- B. Insomnia
- C. Use of nitroglycerin
- D. Use of multivitamins
Correct answer: C
Rationale: The correct answer is C. Sildenafil (Viagra) enhances the vasodilating effect of nitric oxide and is contraindicated with the concurrent use of organic nitrates and nitroglycerin. Using nitroglycerin together with Viagra can lead to severe hypotension and cardiovascular collapse, making it unsafe to combine both medications.
2. A histamine (H2)-receptor antagonist will be prescribed for a client. The nurse understands that which medications are H2-receptor antagonists? Select one that doesn't apply.
- A. Nizatidine (Axid)
- B. Ranitidine (Zantac)
- C. Famotidine (Pepcid)
- D. Ibuprofen (Motrin)
Correct answer: D
Rationale: H2-receptor antagonists like Nizatidine, Ranitidine, and Famotidine are used to suppress gastric acid secretion, relieve heartburn symptoms, and prevent complications of peptic ulcer disease. Ibuprofen, on the other hand, is a nonsteroidal anti-inflammatory drug (NSAID) commonly used for pain relief and inflammation, but it is not an H2-receptor antagonist. It is essential to differentiate between these medication classes to ensure appropriate treatment for gastrointestinal conditions.
3. After administering acetylcysteine (Mucomyst), 20% solution diluted in 0.9% normal saline by nebulizer, the nurse should have which item available for potential use?
- A. Ambu bag
- B. Intubation tray
- C. Nasogastric tube
- D. Suction equipment
Correct answer: D
Rationale: Acetylcysteine is administered via inhalation as a mucolytic. It helps liquefy secretions, making it easier for the client to clear them. However, in some cases, the increased volume of liquefied secretions may be challenging for the client to manage, leading to the potential need for suction equipment to assist in clearing the airway. Therefore, the nurse should have suction equipment available after administering acetylcysteine to address any issues related to excessive secretions.
4. Tamoxifen is prescribed for the client with metastatic breast carcinoma. The nurse understands that the primary action of this medication is to:
- A. Increase DNA and RNA synthesis.
- B. Promote the biosynthesis of nucleic acids.
- C. Increase estrogen concentration and estrogen response.
- D. Compete with estradiol for binding to estrogen in tissues containing high concentrations of receptors.
Correct answer: D
Rationale: The primary action of tamoxifen, an antineoplastic medication used in metastatic breast carcinoma, is to compete with estradiol for binding to estrogen receptors in tissues with high receptor concentrations. By doing so, tamoxifen reduces DNA synthesis and estrogen response, leading to its therapeutic effect in inhibiting the growth of estrogen-sensitive breast cancer cells.
5. When administering etanercept (Enbrel) to a client with rheumatoid arthritis for 3 weeks, what is the most important assessment for the nurse to perform?
- A. Assessing the injection site for itching and edema
- B. Monitoring white blood cell counts and platelet counts
- C. Evaluating for fatigue and joint pain in the client
- D. Checking for a metallic taste in the mouth and loss of appetite
Correct answer: B
Rationale: The priority when administering etanercept (Enbrel) to a client with rheumatoid arthritis is to monitor white blood cell counts and platelet counts. Etanercept can lead to infections and pancytopenia, making it crucial to assess for changes in these blood parameters to detect any potential complications early on.
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