 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] acist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Ketoconazole interacts with many prescription and nonprescription drugs. While you are taking ketoconazole, it is very important to tell your doctor or pharmacist of any changes in medications that you are taking. Some products that may interact with this drug include: other drugs that can cause liver problems (such as acetaminophen). Other medications can affect the removal of ketoconazole from your body, which may affect how ketoconazole works. Examples include isoniazid, nevirapine, rifamycins (such as rifabutin, rifampin), St. John's wort, among others. This medication can slow down the removal of many other medications from your body, which may affect how they work. Examples of affected drugs include some benzodiazepines (such as alprazolam, midazolam, triazolam), domperidone, eletriptan, eplerenone, ergot drugs (such as ergotamine), nisoldipine, drugs used to treat erectile dysfunction-ED or pulmonary hypertension (such as sildenaf </s>