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. 2013 Mar;54(3):276–282.

Table 1.

Table indicating the relationship of half-times to the amount of drug eliminated from the plasma. Five half-times are required to eliminate 97% of the drug

Number of half-times Fraction of initial amount remaining Percent of initial amount eliminated (%)
0 1 0
1 1/2 50
2 1/4 75
3 1/8 88
4 1/16 94
5 1/32 97
6 1/64 98