See also Warning section. This medication is used to treat a chronic viral infection of the liver (hepatitis B). It works by slowing the growth of the virus. Entecavir is a nucleoside analog-type (NRTI) medication. Entecavir is not a cure for hepatitis B and does not prevent the spread of hepatitis B to others through sexual contact or blood/body fluid contamination (e.g., sharing used needles). A series of shots (vaccine) are available to protect uninfected people from hepatitis B virus.
Headache, fatigue, dizziness, and nausea may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
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