Combination Antiviral Therapy for Hepatitis C
How It Works
Combination antiviral therapy helps prevent the virus that causes hepatitis C from reproducing in the body. Peginterferon and ribavirin are combined to give the best response to treatment. A protease inhibitor (such as boceprevir or telaprevir) also may be given along with peginterferon and ribavirin.
Peginterferon is given as a shot once a week. Ribavirin is taken as a pill 2 times a day. During the course of your treatment, your doctor frequently may adjust the amount of medicine you are taking.
The length of your treatment depends on what hepatitis C genotype you have. Genotype 1 generally is treated for 1 year and genotypes 2 and 3 generally are treated for 6 months. If you have genotype 1 and your viral load does not improve after 3 months of treatment, your treatment may be stopped.
Why It Is Used
Combination antiviral therapy is prescribed for people who have ongoing (chronic) hepatitis C infection. It may be given to people who have never had treatment or when interferon alone has failed to control the disease.
How Well It Works
Peginterferon—a longer-acting form of interferon—combined with ribavirin is better than standard interferon combined with ribavirin. The two kinds of peginterferon work similarly.1
How well treatment works is measured by whether you still have the virus in your blood 6 months after treatment. Treatment usually works better if you have genotype 2 or 3 than if you have genotype 1. Most studies have shown that treatment with peginterferon and ribavirin works for up to 50% of people with genotype 1 and up to 80% of people with genotype 2 or 3.2
Combination antiviral therapy is more likely to be effective if you:
Many things affect the decision about who should receive antiviral treatment for hepatitis C.4 For example, treatment may be recommended for people who are at least 18 years old, have detectable levels of the virus in their blood, and have significant liver damage confirmed by a liver biopsy.
All medicines have side effects. But many people don't feel the side effects, or they are able to deal with them. Ask your pharmacist about the side effects of each medicine you take. Side effects are also listed in the information that comes with your medicine.
Here are some important things to think about:
Call your doctor if you have:
Common side effects of this medicine include:
If you develop anemia as a result of taking ribavirin, your doctor may prescribe a medicine called erythropoietin to help your body create more red blood cells.
See Drug Reference for a full list of side effects. (Drug Reference is not available in all systems.)
What To Think About
You will need regular follow-up visits with a liver specialist during treatment. The specialist will order blood tests to check your liver enzyme levels and to see whether the virus is still present.
Peginterferon and other interferons may be given without ribavirin if you have anemia or heart or kidney problems.
People with normal or slightly elevated liver enzyme levels but whose liver biopsy shows little or no liver damage may choose not to have antiviral treatment. Instead, a doctor can monitor the condition with periodic liver function tests and a liver biopsy every 3 to 5 years.
Even if the initial treatment does not eliminate the virus, your doctor may advise you to continue antiviral treatment, because it may reduce liver inflammation. For some people with significant liver damage, antiviral therapy may slow the progression of liver damage or make liver cancer less likely.5 If you already have cirrhosis, some studies show that antiviral therapy can help you live longer.6
Only a few clinical trials have tested antiviral medicines in children. The results suggest that they work about as well in children as in adults. Combination therapy using interferon and ribavirin is now approved by the U.S. Food and Drug Administration for use in children ages 3 to 17 years.
If you are obese or have poorly controlled diabetes, you may need to delay treatment until you get your weight or blood sugar under control.
If you have tried interferon in the past and did not get good results, talk to your doctor about newer combinations of peginterferon with ribavirin or the new protease inhibitors for hepatitis C treatment.
Medicine is one of the many tools your doctor has to treat a health problem. Taking medicine as your doctor suggests will improve your health and may prevent future problems. If you don't take your medicines properly, you may be putting your health (and perhaps your life) at risk.
There are many reasons why people have trouble taking their medicine. But in most cases, there is something you can do. For suggestions on how to work around common problems, see the topic Taking Medicines as Prescribed.
Pregnancy advice for women and men
If you need to take this medicine, talk to your doctor about how you can prevent pregnancy.
For women: Do not use this medicine if you are pregnant or planning to get pregnant.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
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