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

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