Hepatitis B
Hepatitis B
Hepatitis B is a viral infection that causes liver inflammation. It can be spread through unprotected sex, sharing needles, or mother-to-child transmission during birth. Symptoms include jaundice, fatigue, loss of appetite, and nausea.
Show Medications for Hepatitis B
18/05/2026
Updated: 12/06/2026
Hepatitis B: Understanding the Disease
Hepatitis B is a viral infection that affects the liver, causing inflammation and damage to this vital organ. The hepatitis B virus (HBV) is highly contagious and can be spread through various means.
What are the Key Symptoms of Hepatitis B?
- Jaudice: a yellowing of the skin and eyes due to liver dysfunction
- Fatigue: feeling extremely tired or weak
- Loss of appetite: reduced interest in food, leading to weight loss
- Nausea and vomiting: stomach discomfort and regurgitation of food
How is Hepatitis B Diagnosed?
The following diagnostic tests are commonly used to detect hepatitis B:
- HBsAg test: detects the presence of the hepatitis B surface antigen in the blood, indicating an active infection
- HBeAg test: detects the presence of the hepatitis B e-antigen, which indicates high levels of viral replication and infectivity
- Liver function tests: assesses liver damage and function by measuring enzyme levels in the blood
Risk Factors for Hepatitis B Infection
Hepatitis B can be spread through various means, including:
- Unprotected sex with an infected partner
- Sharing needles with someone who has hepatitis B
- Mother to child transmission during birth
- Blood transfusions from an infected donor
Treatment and Management
The standard treatment for hepatitis B is antiviral medication, including:
- Entecavir: the gold-standard treatment for chronic hepatitis B
- Tenofovir: an alternative antiviral medication
- Lamivudine: another alternative antiviral medication
- Adefovir: a less commonly used antiviral medication
Early detection and treatment can help manage the disease, prevent complications, and reduce the risk of transmission to others.
Treatment of Hepatitis B
The treatment of hepatitis B involves antiviral medications that work by inhibiting the replication of the virus. ### Gold Standard: Entecavir Entecavir is a nucleoside analog that works by selectively inhibiting the viral DNA polymerase, thereby preventing the replication of the hepatitis B virus. It is considered the gold standard for the treatment of chronic hepatitis B due to its high efficacy and safety profile. Entecavir has been shown to reduce liver inflammation and fibrosis, and can also improve liver function tests. ### Alternatives Other antiviral medications that may be used as alternatives to entecavir include:- Tenofovir: This medication works by inhibiting the viral DNA polymerase, similar to entecavir. It is also highly effective in reducing viral replication and improving liver function.
- Lamivudine: This medication works by inhibiting the viral reverse transcriptase enzyme, which is essential for the replication of the hepatitis B virus. While it can be effective, lamivudine has a higher risk of developing resistance compared to entecavir or tenofovir.
- Adefovir: This medication works by inhibiting the viral DNA polymerase, but it has a lower efficacy and safety profile compared to entecavir or tenofovir. It is typically reserved for use in patients who are resistant to other antiviral medications.
Causes and Risk Factors of Hepatitis B
Hepatitis B is a viral infection that affects the liver, causing inflammation and damage to liver cells. The virus is transmitted through specific routes, which are crucial for prevention and treatment.
Pathogen Type
The hepatitis B virus (HBV) is classified as a virus, making it a contagious and infectious agent that can be spread from person to person.
Risk Factors
The following are the identified risk factors for contracting hepatitis B:
- Unprotected sex with an infected partner: Engaging in unprotected sexual intercourse with someone who is already infected with HBV can lead to transmission of the virus.
- Sharing needles with someone who has hepatitis B: Sharing needles or syringes with an individual who has HBV can spread the infection through blood-to-blood contact.
- Mother to child transmission during birth: Infants born to mothers infected with HBV are at risk of acquiring the virus during delivery, especially if the mother is not receiving treatment or has a high viral load.
- Blood transfusions from an infected donor: Receiving blood transfusions from an individual who is infected with HBV can lead to transmission of the virus through contaminated blood products.
Understanding these risk factors is essential for preventing hepatitis B infection and reducing its spread in communities.