# Bioscience 2

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An administered drug can be safely considered to be cleared from the body system if it has reached 5% or less of its initial concentration in the blood. Mr Smith (85 years old) is given 80 mg of a drug parentally at 1100 hours. The drug normally has a 2 hour half-life.

How much drug is estimated to be in his system at 1500 hours?
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An administered drug can be safely considered to be cleared from the body system if it has reached 5% or less of its initial concentration in the blood. Mr Smith (85 years old) is given 80 mg of a drug parentally at 1100 hours. The drug normally has a 2 hour half-life.

How much drug is estimated to be in his system at 1500 hours?
An administered drug can be safely considered to be cleared from the body system if it has reached 5% or less of its initial concentration in the blood. Mr Smith (85 years old) is given 80 mg of a drug parentally at 1100 hours. The drug normally has a 2 hour half-life.

How soon could he be safely considered as being cleared of the drug?