Final answer:
To determine the dosage for Zovirax Oral Suspension for a 30-pound child, the child's weight is converted to kilograms, the dose in milligrams is calculated, and then the volume in milliliters is determined based on the medication's concentration. Approximately 6.8 mL per dose is needed. The correct answer is option: b. 6.8 ml
Step-by-step explanation:
To find out how many mL of Zovirax Oral Suspension are needed per dose for a 30-pound child prescribed 20 mg/kg qid x 5 d for chickenpox, we first need to convert the child's weight to kilograms.
Since one pound is equal to 0.453592 kilograms, a 30-pound child would weigh approximately 13.6078 kilograms (30 x 0.453592).
Next, we calculate the dose in milligrams:
20 mg/kg × 13.6078 kg = 272.156 mg per dose
The medication suspension has a concentration of 200 mg of acyclovir per 5 mL.
To find out how many mL this equates to, we can set up a proportion: (200 mg / 5 mL) = (272.156 mg / x mL)
By cross-multiplying and solving for x, we get: 200 mg × x mL = 272.156 mg × 5 mL
x = (272.156 mg × 5 mL) / 200 mg
x = 6.8039 mL
Thus, the child needs approximately 6.8 mL per dose.