The nurse administers a drug with a half-life of 12 hours. To ...

[anjilletteb]

The nurse administers a drug with a half-life of 12 hours. To maintain a steady state of the drug, the nurse recognizes that the medication will need to be administered every:
 
  1. 4 hours.
  2. 6 hours.
  3. 12 hours.
  4. 24 hours.

Question 2

While providing medications the nurse notes that a client has just consumed 8 ounces of milk. Which medication should the nurse withhold from administering?
 
  1. Calcium channel blocker
  2. Diuretic
  3. Aspirin
  4. Tetracycline antibiotic

[Ptupou85]

Answer to Question 1

Answer: 3

1. After 12 hours, 50 of the drug will have been metabolized. Four hours would be too soon to provide another dose of this medication.
2. After 12 hours, 50 of the drug will have been metabolized. Six hours would be too soon to provide another dose of this medication.
3. After 12 hours, 50 of the drug will have been metabolized, and the drug will need to be given again in order to maintain a steady blood level of drug.
4. After 12 hours, 50 of the drug will have been metabolized. Another dose should be provided before 24 hours.

Answer to Question 2

Answer: 4

1. Milk does not interact with calcium channel blockers.
2. Milk does not interact with diuretics.
3. Milk does not interact with aspirin.
4. The calcium in antacids and dairy products reduces the absorption of Tetracyclines.