ATI LPN
ATI LPN Pharmacology Quiz Questions
Extract:
Question 1 of 5
A nurse is preparing to administer vitamin K 1 mg IM to a newborn. Available is vitamin K injection 1 mg/0.5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
Correct Answer: 0.5
Rationale: Using the formula: Volume (mL) = Dose (mg) ÷ Concentration (mg/mL), and noting concentration is 1 mg/0.5 mL (or 2 mg/mL), for a 1 mg dose, Volume = 1 ÷ 2 = 0.5 mL, which is already to the nearest tenth.
Question 2 of 5
Which term is used to describe the stain of bacteria?
Correct Answer: B
Rationale: Gram-positive describes bacteria retaining crystal violet in Gram staining, indicating cell wall structure. Aerobic refers to oxygen needs, cocci to shape, and Bacillus to a genus, not staining.
Question 3 of 5
The patient with tuberculosis is now on isoniazid (INH). Which laboratory test should the nurse monitor?
Correct Answer: A
Rationale: Isoniazid is hepatotoxic, potentially causing liver damage, so monitoring liver function tests (LFTs) is essential to detect early hepatotoxicity. PT/PTT (clotting), BUN (kidney), and CBC (general health) are not primarily affected by INH.
Question 4 of 5
Which class of antibiotic is associated with cartilage toxicity and rupture of the Achilles tendon?
Correct Answer: A
Rationale: Fluoroquinolones (e.g., ciprofloxacin) are linked to tendonitis and Achilles tendon rupture, particularly in older adults or with corticosteroid use, due to effects on connective tissue. Other classes listed do not have this association.
Question 5 of 5
A patient at a rehabilitation center is prescribed erythromycin. The nurse is reviewing the patient's medication list, checking to see if there are medications that should not be taken with this antibiotic. One medication is found. What medication should not be taken with erythromycin?
Correct Answer: A
Rationale: Erythromycin inhibits the metabolism of statins like lovastatin by affecting the CYP3A4 enzyme, increasing the risk of myopathy and rhabdomyolysis. Lasix, ibuprofen, and lisinopril have no significant interactions with erythromycin, making them safe to co-administer.