How many half lives of a drug does it take to eliminate 50 of the drug from the body?
a. One.
b. Two.
c. Four.
d. Five.
Question 2
Which of the following does not facilitate a drug's passage across the bloodbrain barrier?
a. Blood-brain barrier transporter mechanisms?
b. Increased lipid solubility.
c. The ionized form of a drug.
d. Small molecular size.