Rebetol

(Ribavirin)

The active ingredient in Rebetol is ribavirin. Rebetol (ribavirin) is an antiviral medication that works by interfering with viral RNA synthesis and replication. It acts as a nucleoside analog, disrupting the production of viral genetic material and reducing the virus’s ability to multiply. Ribavirin also helps enhance the immune response against the virus, which is why it is commonly used in combination with other antivirals to treat chronic hepatitis C.

Follow all directions given to you by your doctor and read all documents provided, including the full Prescribing Information, FDA-Approved Product Labeling, Instructions for Use, and Medication Guide before using Rebetol. However, the following is a synopsis of the general guidelines for the use of Rebetol:

• Rebetol is taken by mouth as capsules or an oral solution.
• It is usually taken twice daily with food.
• Rebetol is always used in combination with interferon alfa-2b or peginterferon alfa-2a.
• The dose of ribavirin is based on body weight, age, and kidney function.
• Treatment length depends on the hepatitis C virus genotype and response to therapy.
• Blood tests are required before and during treatment to monitor red blood cells, hemoglobin, liver function, and blood cell counts.
• If a dose is missed, take it as soon as remembered unless it is close to the next dose. Do not double the next dose.

In clinical trials, ribavirin (Rebetol) was always given with another medication called interferon. It's possible that many of these side effects were caused by interferon.

• Flu-like symptoms such as fever and muscle aches.
• Fatigue.
• Loss of appetite and weight loss.
• Dry mouth.
• Trouble sleeping.
• Hair loss.
• Nausea.
• Mood changes.
• Vomiting.

Some individuals may experience serious side effects while using Rebetol. These side effects may require immediate medical attention. If you experience any of the following, contact your healthcare provider or seek emergency medical help:

• Hemolytic anemia due to reduced red blood cells.
• Chest pain or symptoms of a heart attack.
• Lung infections and breathing problems.
• Severe depression or mood changes.
• Stevens-Johnson syndrome or severe skin reactions.
• Allergic reactions such as hives, swelling, and trouble breathing.
• Pancreatitis with severe abdominal pain.
• Worsening liver disease or autoimmune hepatitis.

These are not all of the possible side effects of Rebetol. You should always seek medical advice from your healthcare provider for any questions or concerns about your medical condition or treatment. Read all patient information, medication guides, or drug information sheets that come with this medication. You can also report adverse effects to the Food and Drug Administration at www.fda.gov/medwatch or 1-800-FDA-1088.

Before starting Rebetol, it is crucial to discuss any existing health conditions with your healthcare provider. You should be sure that your healthcare provider is aware of all your medical conditions, including if you have:

• Heart disease or heart problems like high blood pressure.
• A history of anemia or low hemoglobin.
• Liver disease or liver problems.
• Kidney disease or reduced kidney function.
• Autoimmune hepatitis.
• Thyroid disorders.
• Sickle-cell anemia or thalassemia.
• A history of depression or severe mental health conditions.
• Organ transplant history.
• Regular follow-up and blood testing are required throughout Rebetol therapy.

Boxed Warning

Rebetol contains ribavirin, which has a boxed warning for severe birth defects and fetal death.

Ribavirin must not be used by pregnant women or by male patients whose sexual partner is pregnant. Extreme care must be taken to avoid pregnancy during treatment and for six months after treatment ends. Pregnancy testing and strict birth control are required for female patients and sexual partners of male patients.

Rebetol should not be used in patients who:

• Are pregnant or planning a pregnancy.
• Are male and have female sexual partners who are pregnant.
• Have hemoglobin disorders such as sickle-cell anemia or thalassemia major.
• Have severe kidney disease.
• Have a known hypersensitivity to ribavirin.

Rebetol begins working shortly after treatment starts, but viral response develops over weeks to months. Treatment success is measured by sustained virological response (SVR), which is assessed after completing therapy.

When Rebetol is taken with other prescription drugs, over-the-counter medications, vitamins, and supplements, it may change how they work or increase the frequency or severity of side effects. Make sure that you tell your healthcare professional about anything that you are taking to avoid any negative drug interactions, including:

• Didanosine increases the risk of fatal liver toxicity and pancreatitis.
• Azathioprine may increase the risk of bone marrow suppression.
• Interferon alfa-2b or peginterferon alfa-2a increases the risk of anemia.

Rebetol is available as capsules and an oral solution. Dosing is individualized based on body weight, age, kidney function, and the combination therapy used.

It should be stored at room temperature, away from the reach of children or pets.

Rebetol is manufactured by Schering.

Yes. Ribavirin is the generic name for Rebetol.

Do not stop Rebetol without medical advice. Stopping treatment early may reduce treatment effectiveness. Your healthcare provider will guide treatment discontinuation if necessary.

Rebetol must not be used during pregnancy because it can cause birth defects or death in an unborn baby. At least 2 reliable forms of effective contraception must be used during treatment and for 6 months after your last dose.

It is not known if Rebetol is safe to take during lactation. Talk to your doctor if you are already breastfeeding or if you have any plans to breastfeed. They will know or recommend what is best for you.