Correct Answer: C

Rationale: Desmopressin is prescribed to decrease urine output in patients with diabetes insipidus. It works by increasing water reabsorption in the kidneys, helping to control fluid balance in the body.

Correct Answer: B

Rationale: When a client increases their daily doses of acetaminophen for joint pain, it raises concerns about possible liver damage due to acetaminophen overdose. LDH (Lactate Dehydrogenase) levels can indicate liver function, so comparing today's levels with previous ones can help assess for liver damage caused by acetaminophen overuse.

Correct Answer: D

Rationale: Alprazolam is a benzodiazepine that primarily works by reducing anxiety. It achieves this by enhancing the inhibitory effects of the neurotransmitter GABA in the brain, which leads to a calming effect on the individual. Therefore, the primary action of alprazolam is to decrease anxiety levels rather than increase energy, induce sedation, or elevate mood.

Correct Answer: C

Rationale: Digoxin, when prescribed to a patient with heart failure, primarily acts by strengthening cardiac contractions. This leads to an improvement in cardiac output, making it an essential medication in managing heart failure. By enhancing the force of contractions, digoxin helps the heart pump more effectively and efficiently, leading to better circulation and symptom control in patients with compromised cardiac function.

Correct Answer: B

Rationale: The correct teaching point for a patient prescribed dabigatran is not to crush or chew the capsules. Doing so can alter the absorption of the medication, increasing the risk of bleeding. It is important for patients to swallow the capsules whole to ensure proper delivery of the medication.