While assessing a patient who is receiving intravenous digitalis, the nurse recognizes that the drug has a negative chronotropic effect. How would this drug effect be evident in the patient?

Correct Answer: B

Rationale: Digitalis has a negative chronotropic effect, meaning it slows down the heart rate. This can be evident in a patient by observing a decrease in their heart rate. Chronotropy refers to the heart rate or rhythm of the heart. Digitalis works by inhibiting the sodium-potassium pump in the heart muscle cells, leading to an increase in intracellular calcium levels. This results in a decreased heart rate and improved contractility of the heart muscle. Therefore, a decreased heart rate is the expected effect when a patient is receiving intravenous digitalis.

Correct Answer: A

Rationale: Insulin glargine is typically administered subcutaneously. Subcutaneous injection allows for slow and continuous absorption of the medication, providing a sustained release of insulin to help regulate blood sugar levels. This route of administration is commonly used for long-acting insulins like insulin glargine to provide basal insulin coverage throughout the day. Sublingual, oral, IV, and other routes are not appropriate for administering insulin glargine.

Correct Answer: D

Rationale: Acetaminophen is not an opioid or NSAID. While it is commonly used to relieve pain and reduce fever, acetaminophen works differently from opioids and NSAIDs. Acetaminophen is believed to reduce pain by inhibiting the production of prostaglandins in the brain, whereas opioids work by binding to opioid receptors in the central nervous system, and NSAIDs work by inhibiting the production of prostaglandins in the peripheral tissues.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: B

Rationale: Pharmacodynamics refers to the study of the biochemical, physiological, and behavioral effects of drugs on the body and their mechanisms of action. It specifically focuses on the drugs' actions at the receptor site and how these actions lead to specific responses in the body. This includes understanding how drugs interact with target receptors, enzymes, and other molecular targets within the body to produce their effects. Pharmacodynamics also involves studying the relationship between the drug concentration and the magnitude of the response it elicits, as well as factors influencing the variability in individual responses to a drug. In summary, pharmacodynamics is crucial for understanding how drugs work in the body and how they produce their therapeutic or adverse effects.