A Child’s Dose For Cefadroxil Is 30mg/kg Body Weight Once A Day For 14 Days. What Is The Smallest Bottle That?

A child’s dose for cefadroxil is 30mg/kg body weight once a day for 14 days. What is the smallest bottle that will provide enough medication to last 14 days if the child weighs 44 pounds?
The answer is: 100 ml bottle of 500mg/5ml but how do you get this answer?

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One Response to “A Child’s Dose For Cefadroxil Is 30mg/kg Body Weight Once A Day For 14 Days. What Is The Smallest Bottle That?”

  1. Kelvin Calorie on December 31st, 2009 at 8:31 pm

    This is the type of problem that you do not think about as a whole but break it down into little bitty steps. First the mass of the child, then total med required, then volume of med given stength
    44 lbs / 2.2 = 20 Kg. Mass of child
    30mg/kg x 20 Kg = 600 mg per day (Kg cancel out)
    600mg/day x 14 days = 8400mg to be dispensed (days cancel out)
    Now you are ready to figure out how to get 8400 mg into a bottle and what size the bottle. Medicine comes in doses of 500mg / 5 mL
    8400 mg / 500mg/5mL = 16.8/5mL (mg cancel out)
    16.8 x 5mL = 84 mL to be dispensed.
    Next size up in bottles is the 100 mL bottle
    Now in order to learn from this you must walk yourself through it until you understand it. This way you have learned sometthing
    Hope you enjoy science

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