The half-life of a drug is the time it takes for a. half of ...

[jake]

The half-life of a drug is the time it takes for
 
  a. half of the drug to be excreted in the urine
  b. plasma concentrations of the drug to drop to half the initial value
  c. half of the drug to reach each and every cell of the human body
  d. half of the drug to reach the liver and be metabolized

Question 2

A newly admitted patient diagnosed with bipolar disorder is speaking loudly and demanding attention.
 
  A nurse assures the patient that the staff is always willing to listen and will help in any way possible but that the patient will need to speak more slowly and softly in order to be understood. The nurse is demonstrating an example of: a. necessary aggression with a difficult patient.
  b. effective, patient-directed therapeutic use of self.
  c. implementing therapeutic patience when providing patient care.
  d. patient education regarding effective nurse-patient communication.

[mistyjohnson]

Answer to Question 1

B
A drug's half-life is the time required for plasma concentrations of a drug to decrease to half of an initial value. For example, after one half-life, 50 of the medication remains in the plasma. After 2 half-lives, 25 of the medication remains in the plasma. After 7 half-lives, less than 1 of the medication remains in the plasma.

Answer to Question 2

B
The most valuable resource of a nurse is the ability to use one's self to help others. To ensure the most effective use of self, it is important to be aware of personal stress that can interfere with one's ability to communicate therapeutically with patients.

[jake]

Thank you

[mistyjohnson]

No problemo