Correct Answer: A

Rationale: To find the dose per administration, first convert the toddler's weight to kg: 28.6 lb · 2.2 = 13 kg. Then calculate the total daily dose: 20 mg/kg 13 kg = 260 mg/day. Since it is divided into two doses, each dose is 130 mg. The concentration of the oral suspension is 250 mg/5 mL = 50 mg/mL. Therefore, to find the volume needed per dose, divide the dose by the concentration: 130 mg · 50 mg/mL = 2.6 mL per dose. Hence, the nurse should administer 2.6 mL per dose. Choices B, C, and D are incorrect as they do not accurately calculate the dosage of chlorothiazide needed per dose based on the toddler's weight and the concentration of the oral suspension.

Correct Answer: D

Rationale: The correct adverse effect to monitor for when administering subcutaneous epinephrine for anaphylaxis is tachycardia. Epinephrine stimulates adrenergic receptors, leading to an increased heart rate (tachycardia). Hypotension (Choice A) is less likely due to the vasoconstrictive effects of epinephrine. Hyperthermia (Choice B) and hypoglycemia (Choice C) are not commonly associated with epinephrine administration for anaphylaxis.

Correct Answer: B

Rationale: Filgrastim is a medication used to stimulate the production of neutrophils in patients with neutropenia. Neutrophils are a type of white blood cell that plays a crucial role in fighting off infections. Therefore, an increase in neutrophil count would indicate a therapeutic effect of filgrastim. The other options, such as erythrocyte count (red blood cells), lymphocyte count, and thrombocyte count (platelets), are not directly affected by filgrastim and would not indicate a therapeutic effect of this medication.

Correct Answer: B

Rationale: The correct answer is B: Proteinuria. Proteinuria can indicate nephrotoxicity, a known adverse effect of gentamicin. Gentamicin is known to cause kidney damage, leading to proteinuria. Hypoglycemia is not typically associated with gentamicin use but may be related to insulin administration or other medical conditions. Nasal congestion is not a common adverse effect of gentamicin. Visual disturbances are also not typically reported with gentamicin use.

Correct Answer: A

Rationale: To calculate the amount of amoxicillin in mL needed per dose, we can use the formula: 50 mg/mL = 250 mg / X mL. Cross multiply to solve for X: 50X = 250. Divide both sides by 50 to find X, which equals 5 mL per dose. Therefore, the nurse should administer 5 mL of amoxicillin per dose. Choice B, 6 mL, is incorrect as it does not match the calculated result. Choice C, 4 mL, is incorrect as it is too low based on the calculation. Choice D, 7 mL, is incorrect as it is too high based on the calculation.