ATI LPN
ATI LPN Pharmacology Quiz Questions
Extract:
Question 1 of 5
A nurse is preparing to administer ondansetron 4 mg IM stat. The amount available is ondansetron for injection 2 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 2
Rationale: Using Volume (mL) = Dose (mg) ÷ Concentration (mg/mL), for a 4 mg dose and 2 mg/mL concentration, Volume = 4 ÷ 2 = 2 mL, a whole number as required.
Question 2 of 5
A nurse is preparing to administer haloperidol 5 mg IM to a client. Available is haloperidol 50 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth/whole number. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 0.1
Rationale:
To calculate the volume of haloperidol to administer, use the formula: Volume (mL) = Dose (mg) ÷ Concentration (mg/mL). Given a dose of 5 mg and a concentration of 50 mg/mL, Volume = 5 ÷ 50 = 0.1 mL. The answer is rounded to the nearest tenth as instructed.
Question 3 of 5
Which of the following complaints by a man taking gentamycin would be most indicative that he is experiencing ototoxicity?
Correct Answer: A
Rationale: Gentamicin, an aminoglycoside, can cause ototoxicity, leading to hearing loss or tinnitus. Difficulty hearing the television directly indicates auditory impairment. Tingling suggests neuropathy, BUN/creatinine elevation indicates nephrotoxicity, and mental status changes are nonspecific.
Question 4 of 5
Which adverse effect unique to vancomycin is caused by histamine release?
Correct Answer: C
Rationale: Red-man syndrome is a histamine-mediated reaction to rapid vancomycin infusion, causing flushing, rash, and pruritus. It is not an allergy but a direct drug effect. Discoloration is associated with rifampin, while ototoxicity and nephrotoxicity are vancomycin side effects unrelated to histamine.
Question 5 of 5
Which of the following stimulates the pancreas to secrete insulin?
Correct Answer: B
Rationale: Hyperglycemia (elevated blood glucose) triggers pancreatic beta cells to secrete insulin to lower glucose levels. Ketoacids result from low insulin, hypoglycemia reduces insulin secretion, and glucagon raises glucose, not directly stimulating insulin.