A 90 lb person is prescribed a drug in the amount of 50mg/kg body per day to be delivered in 2 doses per day. Each tablet contains 250mg of the medicine. How many tabletes should be given per dose?

4 tabletes/dose

Explanation:

mass person = (90 Lb) * (Kg/2.20462 Lb) = 40.823 Kg body

amount of medicine = 50 mg/Kg body. day

frecuency = 2 dose/day

⇒ amount of medicine/day = (50 mg/kg body. day) * (40.823 Kg body) = 2041.168 mg/day

⇒ mg medicine/dose = (20141.168 mg/day) * (day / 2 dose) = 1020.584 mg medicine/dose

∴ mg medicine/tablet = 250 mg medicine/tablet

⇒ # tabletes/dose = (1020.584 mg medicine/dose) * (tablet/250 mg medicine) = 4.082 tabletes/dose

⇒ # tabletes/dose ≅ 4 tabletes/dose