What side effects can this medication cause?

Adefovir may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• weakness
• headache
• diarrhea
• gas
• indigestion
• cough
• sore throat
• runny nose

Some side effects can be serious. If you experience this symptom or any of those listed in the IMPORTANT WARNING section, call your doctor immediately:

• rash

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

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online at http://www.fda.gov/MedWatch/report.htm or by phone 1-800-332-1088.