Chronic hepatitis B

Active Ingredient: Entecavir

Indication for Entecavir

Population group: only children (1 year - 12 years old) , adolescents (12 years - 18 years old)

ฮ•ntecavir is also indicated for the treatment of chronic HBV infection in nucleoside naive paediatric patients from 2 to <18 years of age with compensated liver disease who have evidence of active viral replication and persistently elevated serum ALT levels, or histological evidence of moderate to severe inflammation and/or fibrosis.

For this indication, competent medicine agencies globally authorize below treatments:

0.5 mg once daily

Route of admnistration

Oral

Defined daily dose

0.5 - 0.5 mg

Dosage regimen

From 0.5 To 0.5 mg once every day

Detailed description

For appropriate dosing in the paediatric population, entecavir oral solution or entecavir 0.5 mg film-coated tablets are available.

The decision to treat paediatric patients should be based on careful consideration of individual patient needs and with reference to current paediatric treatment guidelines including the value of baseline histological information. The benefits of long-term virologic suppression with continued therapy must be weighed against the risk of prolonged treatment, including the emergence of resistant hepatitis B virus.

Serum ALT should be persistently elevated for at least 6 months prior to treatment of paediatric patients with compensated liver disease due to HBeAg positive chronic hepatitis B; and for at least 12 months in patients with HBeAg negative disease.

Paediatric patients with body weight of at least 32.6 kg, should be administered a daily dose of one 0.5 mg tablet or 10 ml (0.5 mg) of the oral solution, with or without food. The oral solution should be used for patients with body weight less than 32.6 kg.

Duration of therapy for paediatric patients

The optimal duration of treatment is unknown. In accordance with current paediatric practice guidelines, treatment discontinuation may be considered as follows:

  • In HBeAg positive paediatric patients, treatment should be administered for at least 12 months after achieving undetectable HBV DNA and HBeAg seroconversion (HBeAg loss and anti-HBe detection on two consecutive serum samples at least 3-6 months apart) or until HBs seroconversion or there is loss of efficacy. Serum ALT and HBV DNA levels should be followed regularly after treatment discontinuation.
  • In HBeAg negative paediatric patients, treatment should be administered until HBs seroconversion or there is evidence of loss of efficacy. Pharmacokinetics in paediatric patients with renal or hepatic impairment have not been studied.

Active ingredient

Entecavir

Entecavir, a guanosine nucleoside analogue with activity against HBV polymerase, is efficiently phosphorylated to the active triphosphate (TP) form, which has an intracellular half-life of 15 hours. By competing with the natural substrate deoxyguanosine TP, entecavir-TP functionally inhibits the 3 activities of the viral polymerase: (1) priming of the HBV polymerase, (2) reverse transcription of the negative strand DNA from the pregenomic messenger RNA, and (3) synthesis of the positive strand HBV DNA.

Read more about Entecavir

Related medicines

Develop a tailored medication plan for your case, considering factors such as age, gender, and health history

Ask the Reasoner

Liability Disclaimer : RxReasoner has utilized reasonable care in providing content and services that are accurate, complete and up to date. However, RxReasoner does not accept any responsibility or liability about it. The content and services of RxReasoner are for informational purposes only and they are not intended to be a substitute for the knowledge, expertise, skill, and judgment of physicians, pharmacists, nurses, or other healthcare professionals involved in patient care. RxReasoner offers no medical advice. Users are responsible for the use of the provided content. A shown indication or treatment should not be construed to indicate that the medication is safe, appropriate, or effective in any given patient or under any particular circumstances. The absence of an indication or treatment should not roule out the existence of other appropriate medications. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition or medicament. RxReasoner is not liable for any damages allegedly sustained arising out of the use of its content and services.