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Updated on 24 Apr 2024

entecavir Uses, Side Effects, Interactions, Warnings & Dosing

What dosages is entecavir available in?

What dosages is entecavir available in?

entecavir is available as a 0.5 mg and 1 mg oral tablet and a
0.05 mg/mL oral solution.

What is entecavir used for?

What is entecavir used for?

entecavir is a first-choice antiviral medication used for the treatment of hepatitis B in adults and children at least 2 years of age.

How does entecavir work?

How does entecavir work?

entecavir is a type of antiviral medication called a nucleoside reverse transcriptase inhibitor (NRTI). It inserts itself into the hepatitis B virus’s DNA. This prevents the virus from making copies of itself.

How do I take entecavir?

How do I take entecavir?

entecavir is typically taken once a day on an empty stomach. The dose depends on your liver health and your hepatitis B infection. For children under 16 years of age dose is based on the child’s weight.

Is it safe for me to take entecavir?

Is it safe for me to take entecavir?

entecavir is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you.

entecavir Common Side Effects

entecavir Common Side Effects

Common side effects of entecavir include:

  • Headache
  • Fatigue
  • Dizziness
  • Nausea
  • Higher liver lab results
entecavir Serious Side Effects

entecavir Serious Side Effects

Serious side effects are rare with entecavir. Contact your healthcare provider immediately if you experience any of the following.

  • Lactic acidosis: extreme tiredness, sudden weakness, fast and shallow breathing, loss of appetite, nausea, vomiting
  • Liver problems: stomach pain, tiredness
Effects of other drugs, drug classes and over-the-counter products on entecavir

Effects of other drugs, drug classes and over-the-counter products on entecavir

The following medications may interact with entecavir:

  • Drugs that reduce renal function or compete for active tubular secretion may increase serum concentrations of either entecavir or the coadministered drug
Who makes entecavir?

Who makes entecavir?

Various FDA-approved generic manufacturers

Is entecavir safe in pregnancy?

Is entecavir safe in pregnancy?

It is not known if entecavir will harm your unborn baby. There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to entecavir during pregnancy. Healthcare providers are encouraged to register patients by calling the Antiretroviral Pregnancy Registry (APR) at 1-800-258-4263.


What to do if you missed your entecavir dose

The FDA's medical product safety reporting program for health professionals, patients and consumers.

Learn more about reporting side effects
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Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

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