Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any of these serious side effects:

*pale skin, easy bruising or bleeding, unusual weakness;
*fever, chills, body aches, flu symptoms;
*diarrhea that is watery or bloody;
*blurred vision, trouble seeing colors
*numbness, burning, pain, or tingly feeling in your hands or feet;
*seizure (convulsions); or
*muscle pain or weakness, numb or cold feeling in your arms and legs, trouble breathing, nausea with vomiting, and fast or uneven heart rate.

Less serious side effects may be more likely to occur, such as:

*headache, dizziness;
*nausea, vomiting, constipation, stomach pain or upset;
*sleep problems (insomnia);
*itching;
*discolored tongue, unusual or unpleasant taste in the mouth;
*vaginal itching or discharge; or
*yeast infection in the mouth.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.