Answer :
The patient would need to take approximately 32 mg of isotretinoin per day, which means they should take 3 capsules of the 10 mg soft capsules each day.
To determine the proper dose of isotretinoin for a patient weighing 141 lbs, we need to follow these steps:
Convert the body weight from pounds (lbs) to kilograms (kg):
[tex]\text{Weight in kg} = \frac{\text{Weight in lbs}}{2.20462} = \frac{141}{2.20462} \approx 64.0 \text{ kg}[/tex]
Calculate the dose in milligrams (mg) based on the patient’s body weight:
The prescribed dose is 0.5 mg/kg.
[tex]\text{Dose in mg} = 0.5 \times \text{Weight in kg} = 0.5 \times 64.0 = 32 \text{ mg/day}[/tex]
Determine the number of capsules needed:
Each capsule contains 10 mg of isotretinoin.
[tex]\text{Number of capsules} = \frac{\text{Dose in mg}}{10} = \frac{32}{10} = 3.2 \approx 3 \text{ capsules/day}[/tex]
