a nurse is preparing to administer amoxicillin 20 mgkgday po to divide equally every 12 hr to a preschooler who weighs 44 l the amount available is a
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ATI RN

ATI Pharmacology Proctored Exam

1. A child is prescribed Amoxicillin 20 mg/kg/day PO to be administered every 12 hr. The child weighs 44 lb. The available medication is amoxicillin suspension 250 mg/5 mL. How many mL should be given per dose?

Correct answer: A

Rationale: To calculate the dosage per administration: Convert the weight to kg (44 lb / 2.2 lb/kg = 20 kg). Then, (20 mg/kg/day x 20 kg) / 2 (for every 12 hr dosing) = 200 mg per dose. (200 mg / 250 mg) x 5 mL = 4 mL per dose. Therefore, the nurse should administer 4 mL of amoxicillin suspension per dose. Choice B, 5 mL, is incorrect because the calculation shows that 4 mL is the correct dose. Choices C and D are also incorrect as they are not in line with the calculated dosage based on the weight of the child and the concentration of the medication.

2. When teaching a client with a prescription for Phenytoin, which of the following instructions should the nurse include?

Correct answer: C

Rationale: Phenytoin is known to cause gingival hyperplasia, a condition characterized by overgrowth of gum tissue. The nurse should instruct the client to monitor for signs of gingival hyperplasia, such as swollen or bleeding gums. Good oral hygiene practices are essential to prevent or manage this side effect. Choices A, B, and D are incorrect. Phenytoin does not typically cause a mild rash, should be taken with food to reduce gastrointestinal upset, and does not warrant an increase in calcium intake.

3. What is levothyroxine's pharmacologic classification?

Correct answer: A

Rationale: Levothyroxine is classified as a thyroid preparation because it is a synthetic form of the thyroid hormone thyroxine. It is primarily used to treat hypothyroidism by supplementing or replacing the natural thyroid hormones in the body, helping to regulate metabolism and energy levels. Choice B, Metabolic Inhibitors, is incorrect because levothyroxine does not inhibit metabolism but rather helps regulate it. Choice C, Analgesic, is incorrect as levothyroxine is not used for pain relief but for thyroid hormone replacement therapy. Choice D, Loop Diuretic, is also incorrect as loop diuretics are medications that act on the kidneys to increase urine production and are not related to thyroid hormone replacement therapy.

4. What is a common side effect of Albuterol?

Correct answer: A

Rationale: A common side effect of Albuterol is paradoxical bronchospasm, a condition where the airways become more constricted instead of relaxing. This can be a serious adverse reaction to the medication. Choices B, C, and D are incorrect as they are not commonly associated with Albuterol use. Diarrhea and seizures are not typically reported side effects of Albuterol, and vision loss is not a recognized side effect of this medication.

5. What is the antidote for Warfarin?

Correct answer: C

Rationale: Vitamin K is the antidote for Warfarin toxicity as it helps reverse the anticoagulant effects of Warfarin. Warfarin works by inhibiting vitamin K-dependent clotting factors, and administering vitamin K can replenish these factors, thereby counteracting the anticoagulant effects of Warfarin. Vitamin D, Vitamin C, and Vitamin B6 do not have the specific mechanism to counteract the anticoagulant effects of Warfarin, making them incorrect choices.

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