Practice Question
A client frequently takes diphenhydramine (Benadryl) to alleviate his upper respiratory symptoms associated with allergies. Which of the following mechanisms of action applies to diphenhydramine (Benadryl)?
Answer Choices:
Correct Answer:
Blocks histamine receptors and inhibits acetylcholine by binding to HI receptors.
Rationale:
Diphenhydramine is an H1 receptor antagonist that blocks the action of histamine, relieving allergic symptoms such as sneezing and itching. It also exhibits anticholinergic effects by blocking acetylcholine, leading to side effects like dry mouth and sedation. It does not affect H4 receptors or stimulate histamine.
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This question is from RN Pharmacology Final Exam which contains 84 questions.
More Questions from This Exam
A nurse is caring for a client with an elevated serum potassium level of 6.0 mEq/L (3.5-5.0 mEq/L). Which scheduled medication should the nurse plan to administer?
Answer Choices:
A. Sertraline
B. Captopril
C. Sodium polystyrene sulfonate
The nurse is administering an estrogen blocker to a client diagnosed with advanced breast cancer. Which of the following side effects will the nurse caution the client regarding?
Answer Choices:
A. Suicide
B. Increase risk of lymphomas
C. Thromboembolic events
D. Flushing effect
The nurse is caring for a client who has begun to take sertraline (Zoloft) for newly diagnosed depression. Which of the following conditions is associated with an overdose of this medication class?
Answer Choices:
A. Tardive Dyskinesia
B. Increased arousal
C. Serotonin syndrome
D. Hypertensive crisis
A client is taking cyclobenzaprine (Flexeril) for acute muscle spasms of the back. The nurse educates the client on which possible anticholinergic side effects associated with this medication? (Select all that apply)
Answer Choices:
A. Tachycardia
B. Excessive lacrimation
C. Decreased urination
D. Excessive sweating
E. Dry mouth
A client admitted to the hospital has been placed on furosemide (Lasix) for the treatment of heart failure. Which side effect should the nurse monitor for associated with furosemide (Lasix)?
Answer Choices:
A. Hypokalemia
B. Hypertension
C. Hypoglycemia
Question Details
- Category: RN Nursing Exam(s)
- Subcategory: ATI Exam(s)
- Domain: RN ATI Pharmacology
- Answer Choices: 4