Nokea
Drug which interferes with metabolism of theophylline is:
- A. Erythromycin
- B. Gentamicin
- C. Penicillin
- D. Furazolidone
Correct Answer: A
Rationale: Erythromycin inhibits P-450, increasing theophylline levels.
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A client is taking Humulin NPH insulin daily every morning. The nurse reinforces instructions for the client and tells the client that the most likely time for a hypoglycemic reaction to occur is:
- A. 2 to 4 hours after administration
- B. 4 to 12 hours after administration
- C. 16 to 18 hours after administration
- D. 18 to 24 hours after administration
Correct Answer: B
Rationale: Humulin NPH is an intermediate-acting insulin. The onset of action is 1.5 hours, it peaks in 4 to 12 hours, and its duration of action is 24 hours. Hypoglycemic reactions most likely occur during peak time.
You are designing a drug regimen for a patient. What should be considered?
- A. Quality-of-life issues
- B. Ethnicity of patient
- C. Gender
- D. Quantity-of-life issues
Correct Answer: A
Rationale: Quality-of-life issues ensure the regimen aligns with patient needs and tolerability, enhancing adherence.
Pregnant patients who are taking isoniazid (INH) should take 25 mg/day of vitamin B6 (pyridoxine) to prevent:
- A. Beriberi
- B. Peripheral neuropathy
- C. Rickets
- D. Megaloblastic anemia
Correct Answer: B
Rationale: Vitamin B6 supplementation prevents INH-induced peripheral neuropathy.
Which of the following is biguanide:
- A. Glibenclamide
- B. Metformin
- C. Acarbose
- D. Liraglutide
Correct Answer: B
Rationale: Metformin is a biguanide that reduces hepatic glucose output.
The typical response to intravenous injection of 5-HT in an anaesthetised animal is:
- A. Rise in BP
- B. Fall in BP
- C. Rise followed by brief fall in BP
- D. Sharp fall, followed by brief rise, followed by prolonged fall in BP
Correct Answer: D
Rationale: IV 5-HT (serotonin) typically causes a triphasic BP response in anesthetized animals: an initial sharp fall (vasodilation), a brief rise (vasoconstriction), and a prolonged fall (Bezold-Jarisch reflex).