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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?

Correct Answer: 3.2 days

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Dosage Form Design MCQ: 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? | Extra Education