Answer to Practice Problem #3 for Routes of Elimination of Xenobiotics Tutorial:
8 hours. Since the half-life of the drug is 4 hr, the concentration will decline from 100 mcg/ml to 50 mcg/ml in 4 hr. In another 4 hr it will decline from 50 mcg/ml to 25 mcg/ml.
ã 2004 - Craig K. Svensson, Pharm.D., Ph.D.
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