A drug solution has half life of 21 days. Assuming that drug undergoes – McqOptions

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1.	A drug solution has half life of 21 days. Assuming that drug undergoes first order kinetics, how long will it take for the potency to drop to 90% of initial potency?
A.	3.2 days
B.	9.6 days
C.	16 days
D.	6.2 days
Answer» B. 9.6 days

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