Vaqta (Hepatitis A vaccine) (Hepatitis A vaccine, inactivated) — Uses, Dosage, Side Effects & Safety

Drug class: Vaccines & Immunization

Overview

Vaqta is a vaccine used to prevent infection caused by the hepatitis A virus (HAV). Hepatitis A is a contagious liver disease that can cause mild to severe illness, including fever, fatigue, jaundice, and abdominal pain. The vaccine is made from inactivated (killed) hepatitis A virus, so it cannot cause the disease. Vaqta works by stimulating your immune system to produce antibodies against hepatitis A. This helps your body recognize and fight the virus if you are exposed in the future. The vaccine is recommended for children, adults, travelers to certain countries, people with chronic liver disease, and others at increased risk. Key points: Vaqta is given as an injection, usually in two doses several months apart. It is safe, effective, and provides long-lasting protection. It does not treat active hepatitis A infection.

Therapeutic uses

  • Active immunization against Hepatitis A virus (HAV) infection
  • Prevention of Hepatitis A in individuals at increased risk of exposure
  • Post-exposure prophylaxis against Hepatitis A (in certain situations)
  • Travelers to endemic areas for Hepatitis A

For related Vaqta (Hepatitis A vaccine) guidance, compare Rabies vaccine and Rotavirus vaccine.

Common side effects

  • Injection site pain
  • Headache
  • Fever
  • Fatigue
  • Irritability
  • Anaphylaxis

Frequently Asked Questions about Vaqta (Hepatitis A vaccine)

How effective is Vaqta in preventing hepatitis A?

Vaqta is highly effective, with over 95% of people developing protective antibodies after the full two-dose series. Protection typically lasts at least 20 years or more.

Who should receive the hepatitis A vaccine?

The vaccine is recommended for all children at age 12–23 months, travelers to countries with high hepatitis A rates, people with chronic liver disease, men who have sex with men, people who use illicit drugs, and others at increased risk.

Can Vaqta be given during pregnancy?

Vaqta is generally considered safe during pregnancy if indicated, but should be given only if the potential benefits outweigh the risks. Discuss with your healthcare provider.

What should I do if I have a reaction to the vaccine?

Mild reactions such as soreness or low-grade fever are common and usually resolve on their own. If you experience severe symptoms like difficulty breathing or swelling, seek emergency medical care immediately.

Is Vaqta a live vaccine?

No, Vaqta is an inactivated (killed) vaccine and cannot cause hepatitis A infection.

Can I get Vaqta if I have a weakened immune system?

Yes, but the immune response may be lower. It is still recommended for people with chronic liver disease or other risk factors. Discuss with your healthcare provider.

How long does protection from Vaqta last?

Protection lasts at least 20 years after the full series, and likely much longer. Booster doses are not routinely recommended.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.