A nurse is assessing a client who has hypermagnesemia.
Which of the following medications should the nurse prepare to administer?

This is because TB is caused by a bacterium that can develop resistance to single-drug therapy, so a combination of drugs is used to prevent or treat drug-resistant strains. Some of the common drugs used for TB are isoniazid, rifampin, ethambutol, and pyrazinamide.

Choice A is wrong because the duration of treatment for active TB is usually 6 to 9 months, not 3 years.

Choice B is wrong because tuberculin skin tests are not reliable indicators of disease activity or response to treatment, as they can remain positive for years after successful therapy.

Choice C is wrong because blood tests to monitor kidney function are not routinely required for TB treatment unless the client has a preexisting renal impairment or is taking drugs that are nephrotoxic.

Taking a high-ceiling diuretic predisposes this client to developing digoxin toxicity because it can cause hypokalemia (low blood potassium level), which increases the sensitivity of the heart to digoxin. Digoxin is a medicine that is used to treat heart failure or arrhythmias (abnormal heart rhythms) by increasing cardiac contractility and controlling the heart rate. Digoxin toxicity happens when there is too much digoxin in the body and it becomes harmful, causing symptoms such as nausea, vomiting, headache, confusion, vision disturbance, and irregular heartbeat.

Choice A is wrong because taking an HMG CoA reductase inhibitor (also called a statin) does not increase the risk of digoxin toxicity.

Statins are lipid-lowering medications used to prevent coronary heart disease by blocking an enzyme involved in cholesterol synthesis.

Statins do not affect the blood potassium level or the sensitivity of the heart to digoxin.

Choice B is wrong because having a 10-year history of COPD (chronic obstructive pulmonary disease) does not increase the risk of digoxin toxicity. COPD is a lung condition that causes breathing difficulties and chronic inflammation.

COPD does not affect the blood potassium level or the sensitivity of the heart to digoxin.

Choice D is wrong because having a prolapsed mitral valve does not increase the risk of digoxin toxicity.

A prolapsed mitral valve is a condition where the valve between the left atrium and left ventricle of the heart does not close properly, allowing some blood to leak back into the atrium.

A prolapsed mitral valve does not affect the blood potassium level or the sensitivity of the heart to digoxin.