A patient who is addicted to heroin is admitted to the hospital for treatment of an infection. The patient is prescribed methadone (Dolophine) as part of a detoxification program. What is the rationale for using methadone in this patient?

The correct answer is choice A. Hepatic necrosis.Acetaminophen (APAP) is a common cause of drug-induced liver injury and can lead to hepatic necrosis, especially in patients who have chronic hepatitis C.APAP is metabolized by the liver and produces a toxic intermediate called N-acetyl-p-benzoquinone imine (NAPQI), which can deplete glutathione and damage hepatocytes.Patients who have chronic hepatitis C may have reduced glutathione levels and increased oxidative stress, making them more susceptible to APAP toxicity.

Choice B. Pulmonary fibrosis is wrong because APAP does not cause pulmonary fibrosis.

Pulmonary fibrosis is a chronic lung disease that involves scarring of the lung tissue and impaired gas exchange.Some drugs that can cause pulmonary fibrosis are amiodarone, bleomycin, methotrexate and nitrofurantoin.

Choice C. Pancreatitis is wrong because APAP does not cause pancreatitis.

Pancreatitis is an inflammation of the pancreas that can result from gallstones, alcohol abuse, hypertriglyceridemia, hypercalcemia, infections, trauma or certain medications.

Some drugs that can cause pancreatitis are azathioprine, valproic acid, didanosine and pentamidine.

Choice D. Cardiac dysrhythmias is wrong because APAP does not cause cardiac dysrhythmias.

Cardiac dysrhythmias are abnormal heart rhythms that can result from electrolyte imbalances, ischemia, myocardial infarction, heart failure, congenital defects or certain medications.

Some drugs that can cause cardiac dysrhythmias are digoxin, quinidine, sotalol and erythromycin.

The correct answer is choice A, B, C, and D.Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that has anti-inflammatory, analgesic, and antipyretic effects.It works by inhibiting the synthesis of prostaglandins, which are involved in inflammation, pain, and fever.However, ibuprofen can also cause adverse effects such as gastric irritation, bleeding complications, renal impairment, and hypersensitivity reactions.

Therefore, the nurse should instruct the client to:

• Take ibuprofen with food or milk to prevent gastric irritation.This will reduce the direct contact of the drug with the stomach lining and decrease the risk of ulcers and bleeding.

• Drink at least 2 liters of fluid per day to prevent renal impairment.This will help maintain adequate hydration and renal perfusion and prevent the accumulation of ibuprofen in the kidneys.

• Avoid alcohol and other NSAIDs to prevent bleeding complications.Alcohol and other NSAIDs can increase the risk of gastric bleeding by interfering with the protective effects of prostaglandins on the stomach mucosa.

• Report any signs of hypersensitivity such as rash, itching, or wheezing.These may indicate an allergic reaction to ibuprofen that can be serious or life-threatening.

Choice E is wrong because ibuprofen does not affect blood pressure significantly.However, some other NSAIDs such as celecoxib may increase the risk of cardiovascular events such as thrombosis, myocardial infarction, and stroke.Therefore, clients with hypertension or cardiovascular disease should use NSAIDs with caution and monitor their blood pressure regularly.