87.5 mg/ml (50 of 3" dose + 25 of 2" dose + 12.5 of 1' dose) o After 16 hrs (4 t1/2) --> 93.75 (50 of 4th dose + 25 of 3rd dose + 12.5 of 2' dose + 6.25 of 1" dose) o After 20 hrs (5 t1/2) --> 96.875 (50 of 5th dose + 25 of 4th dose + 12.5 of 3rd dose + 6.25 of 2' dose + 3.125 of V dose) o After 24 hrs (6 t1/2) --> 96.875 (50 of 6th dose + 25 of 5th dose + 12.5 of 4th dose + 6.25 fo 3rd dose + 3.125 of 2' dose + nil from 1st dose, after 5 t1/2 nearly complete drug elimination occurs & first dose is eliminated after 5 VA). o So, after 5 t1/2 plasma concentration will be constant.">