Get emergency medical help if you have signs of an allergic reaction (hives, fever, chest pain, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).
Call your doctor at once if you have:
fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out);
unusual weakness or tiredness, dizziness, nausea, and vomiting; or
liver problems--upper stomach pain, fever, loss of appetite, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes).
Common side effects may include:
nausea, diarrhea, stomach pain
breast swelling;
headache, dizziness; or
abnormal liver function tests.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Ketoconazole side effects (more detail)
