Possible side effects from ketoconazole may include:

nausea
vomiting
diarrhea 

Tell your doctor if any of these symptoms are severe or do not go away:   

nausea
vomiting
abdominal pain
diarrhea
headache
dizziness
fatigue
itching 

If you experience any of the following symptoms, call your doctor immediately:

allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives)
pale stools
yellowish skin or eyes
abdominal pain
unusual fatigue
dark urine

N.B. Recent studies have shown that oral administration of ketoconazole may cause a decrease in the number of sperm (male reproductive cells) produced and a decline in sperm mobility, especially if it is taken at high doses. Talk to your doctor about the risks of taking this medication if you are a man and would like to have children.

Ketoconazole may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

 

FDA Information

Why is this medication prescribed?

Other uses for this medicine

Dosage and using this medicine

What special precautions should I follow?

What should I do if I forget a dose?

What storage conditions are needed for this medicine?

In case of an emergency/overdose