Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Rate of medication elimination

  1. May 11, 2010 #1
    1. The problem statement, all variables and given/known data
    If an antibiotic at 100mg eliminates itself from the body at a rate of 10% every 4 hours, after the first four hours the amount left in the body is 90%. Does the next 10% reduce by the remaining amount in the body (90 mg) or the original dose ingested (100 mg)?


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 11, 2010 #2
    After the first 4 hours, 90mg of the antibiotic remain in the body. After the next 4 hours 81mg's of the antibiotic remains in the body etc.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook