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Dmelendez09 Dmelendez09
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6 years ago
After seven half-lives of a drug, which of the following percentages of the medication or drug remains in the plasma of the person taking that drug?
 
  a. less than 1
  b. 1.5
  c. 5
  d. 50
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#1
6 years ago
A
After seven half-lives, less than 1 of the medication remains in the plasma. A drug's half-life is the time required for plasma concentrations of a drug to decrease to half of an initial value. After each successive half-life, half of the medication remains in the plasma that was there before. For instance, after the eighth half-life, less than 0.5 of the medication remains in the plasma, which is half of the medication in the plasma that was present after the seventh half-life
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