A nurse is preparing to administer phenobarbital 3 mg/kg/day PO in two divided doses to a client who weighs 145 lb. The amount available is phenobarbital 100 mg/tablet. How many tablets should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1"]
Convert pounds to kilograms:
Conversion factor: 1 kg = 2.2 lb
=145 lb / 2.2 lb/kg
= 65.9 kg
Calculate the total daily dose:
Total daily dose (mg) = Weight (kg) × Dosage (mg/kg/day)
= 65.9 kg 3 mg/kg/day
= 197.7 mg/day
Calculate the dose per administration (divided into two doses):
Dose per administration (mg) = Total daily dose (mg) / Number of doses
=197.7 mg/day / 2 doses
= 98.85 mg/dose
Calculate the number of tablets per dose:
Number of tablets = Desired dose (mg) / Available dose (mg/tablet)
=98.85 mg/dose / 100 mg/tablet
= 0.9885 tablets
Round to the nearest whole number:
0.9885 tablets is 1 tablet
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Anorexia. While gastrointestinal side effects such as nausea and esophageal irritation can occur with alendronate, anorexia is not a common adverse effect. If severe nausea leads to decreased appetite, the client should report this to their provider, but it is not a primary concern compared to more serious side effects.
B. Jaw pain. Jaw pain can indicate osteonecrosis of the jaw (ONJ), a rare but serious adverse effect associated with long-term bisphosphonate use. This condition involves poor bone healing, especially after dental procedures, and can lead to bone deterioration. Clients taking alendronate should report any persistent jaw pain and undergo regular dental exams to monitor bone health.
C. Insomnia. Alendronate does not typically cause insomnia. While some medications, such as corticosteroids and stimulants, are linked to sleep disturbances, alendronate does not affect the central nervous system in a way that would disrupt sleep patterns.
D. Bruising. Alendronate does not interfere with platelet function or coagulation, making bruising an unlikely adverse effect. Clients who experience unexplained bruising should be evaluated for other underlying causes, such as blood disorders or medication interactions.
Correct Answer is B
Explanation
A. "Place a thick layer of the medication on open areas." Topical corticosteroids like fluticasone should not be applied in thick layers or to open wounds, as excessive absorption can lead to systemic side effects such as adrenal suppression. A thin layer is sufficient to achieve the desired anti-inflammatory effects while minimizing adverse reactions.
B. “Rub the medication until it disappears.” Topical corticosteroids should be applied in a thin layer and gently rubbed into the skin until no visible residue remains. This ensures even absorption without excessive medication buildup, reducing the risk of local and systemic side effects, especially in infants who have a higher risk of absorption due to their thinner skin.
C. "Cover the area with an occlusive dressing." Occlusive dressings increase medication absorption, which can lead to systemic corticosteroid effects such as skin thinning, delayed wound healing, and adrenal suppression. Occlusion should only be used under medical supervision, especially in infants who are more susceptible to these effects.
D. "Apply the medication to your infant's entire arm." Fluticasone should be applied only to affected areas, not the entire limb. Applying it over a larger area than necessary increases the risk of systemic absorption and side effects. The medication should be used only as directed for targeted treatment of atopic dermatitis.
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