practice week 3

Consider the equation for firstorder kinetics: C = Co*e^-k*t. the value of ‘e^-k*t’ is equal to the

• Amount of drug remaining

• Concentration of drug remaining

• Fraction of time elapsed

• Fraction of the initial concentration remaining at time t

If the drug elimination from the body is first order, The inital dose is 200 mg, find the amount of the dose is remaining in the body at 3half lives is

• 25 mg

• 12.5 mg

• 50 mg

• 6.25 mg

If drug elimination from the body is first-order, the percentage of the dose remaining in the body at 2 half-lives is:

• 10 %

• 25 %

• 50%

• 76%

WOTF terms for fraction of an IV bolus dose that is lost (consumed ) in the body at the time t for first order kinetics

• e^-kt

• 1- e^-kt

• 1 /(e^-kt)

• None of them are correct

If the drug elimination from the body is first order, the percentage of the dose is lost in the body at 2 half lives is

• 25%

• 25%

• 
  75%

• 
  100%