Nokea
Vincristine toxicity frequently presents as:
- A. Anemia
- B. Neutropenia
- C. Thrombocytopenia
- D. Polyneuritis
Correct Answer: D
Rationale: Vincristine commonly causes neurotoxicity, including polyneuritis.
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A 75-year-old woman with diabetes is taking an oral antidiabetic drug. One day she goes without eating for 18 \mathrm{~h}. Her serum glucose concentration is 48 \mathrm{mg} / \mathrm{dL} (hypoglycemic) upon arrival at the emergency department, where she is deemed to be in critical condition. Which of the following drugs most likely aggravated this fasting hypoglycemia?
- A. Acarbose
- B. Glyburide
- C. Metformin
- D. Pioglitazone
Correct Answer: B
Rationale: Glyburide, a sulfonylurea, can cause severe hypoglycemia, especially during fasting, due to prolonged insulin release.
A 7-year-old male fell off a wood pile while playing. He has been admitted to the ICU with multiple broken bones and internal bleeding. What should the nurse know about drug therapy in this type of patient?
- A. Adverse effects may be decreased
- B. Therapeutic effects may be increased
- C. Pharmacodynamics may be altered
- D. Pharmacokinetics remain the same
Correct Answer: C
Rationale: Trauma alters pharmacodynamics (drug effects) due to physiological stress and injury responses.
Which of the following drug can cause hypoglycemia:
- A. Acarbose
- B. Glipizide
- C. Metformin
- D. Pramlintide
Correct Answer: B
Rationale: Glipizide, a sulfonylurea, can cause hypoglycemia by excessively stimulating insulin release from pancreatic beta cells.
Sarah developed a rash after using a topical medication. This is a type __ allergic drug reaction.
- A. I
- B. II
- C. III
- D. IV
Correct Answer: D
Rationale: A rash from topical medication is a Type IV (delayed hypersensitivity) reaction , typically contact dermatitis, not immediate (I), cytotoxic (II), or immune complex (III).
Once phosphorylated, the intracellular segment of a receptor tyrosine kinase
- A. Activates adenylate cyclase
- B. Causes dissociation of the ligand from an allosteric binding site
- C. Terminates intracellular signaling cascades
- D. Allows docking of intracellular proteins involved in signal transduction
Correct Answer: D
Rationale: Phosphorylation enables docking of signaling proteins, initiating transduction cascades.