Which patient should not be given ketoconazole for Cushing's disease?

The administration of ketoconazole is contraindicated in patients with elevated liver function tests due to the drug's potential hepatotoxic effects. Ketoconazole is an antifungal medication that can cause liver injury, particularly in individuals who already show signs of liver dysfunction. Monitoring of liver function is essential during treatment, and in patients who exhibit abnormal liver function tests, the risk of exacerbating liver problems becomes significant. Therefore, using ketoconazole in a patient with elevated liver function tests could lead to severe complications, making it essential to avoid this treatment option for such cases.

The other options presented do not inherently impose the same level of risk in relation to ketoconazole treatment. Headaches and fatigue are common symptoms that may be associated with Cushing's disease but are not contraindications for the use of ketoconazole. A recent diagnosis of hepatitis C may raise concerns for liver health, but it does not provide the same immediate risk factor as already elevated liver function tests.