Exam 5: Pharmacodynamics

The nurse administers naloxone [Narcan] to a patient who has received a toxic dose of morphine sulfate. The nurse understands that the naloxone is effective because of which action?

Two nurses are discussing theories of drug-receptor interaction. Which statements are true regarding the affinity of a drug and its receptor?

Which drugs will not be affected by interpatient variability?

A patient reports becoming "immune" to a medication because it no longer works to alleviate symptoms. The nurse recognizes that this decreased effectiveness is likely caused by:

A patient who is taking morphine for pain asks the nurse how a pain medication can also cause constipation. What does the nurse know about morphine?

What occurs when a drug binds to a receptor in the body?

A patient has been receiving an antibiotic with a small therapeutic index for 10 days. Upon assessment, the nurse notes an increase in the drug's side effects. What would be the nurse's priority action?

A patient is receiving digoxin twice daily. When assessing the patient before giving a dose, the nurse counts a pulse of 60 beats/min and learns that the patient is experiencing nausea. The nurse consults a drug manual and verifies that the ordered dose is correct. What should the nurse do?