Peginterferon alfa-2b (Subcutaneous)
Medically reviewed by Drugs.com. Last updated on Feb 10, 2022.
May cause or aggravate fatal or life-threatening neuropsychiatric, autoimmune, ischemic, and infectious disorders. Monitor closely and withdraw therapy with persistently severe or worsening signs or symptoms of these disorders .Subcutaneous route(Powder for Solution)
The risk of serious depression, with suicidal ideation and completed suicides, and other serious neuropsychiatric disorders are increased with alpha interferons, including peginterferon alfa-2b. Permanently discontinue peginterferon alfa-2b in patients with persistently severe or worsening signs or symptoms of depression, psychosis, or encephalopathy. These disorders may not resolve after stopping peginterferon alfa-2b .
Commonly used brand name(s)
In the U.S.
- Peg Intron RP
Available Dosage Forms:
- Powder for Solution
Therapeutic Class: Antineoplastic Agent
Pharmacologic Class: Interferon, Alfa (class)
Uses for peginterferon alfa-2b
Peginterferon alfa-2b injection is a synthetic (man-made) version of substances normally produced in the body to fight infection. Peginterferon alfa-2b injection is used alone or together with ribavirin and another drug called a hepatitic C virus (HCV) NS3/4A protease inhibitor (eg, boceprevir or telaprevir) to treat chronic hepatitis C infection. It is used for patients who have never been treated by alpha interferons. The combination treatment of peginterferon alfa-2b and ribavirin is used to treat adults and children 3 years of age and older who show symptoms of liver damage.
Peginterferon alfa-2b injection is also used to prevent malignant melanoma (a type of skin cancer) from coming back after it has been removed by surgery. Peginterferon alfa-2b should be started within 84 days of surgery to remove lymph nodes containing cancer.
Peginterferon alfa-2b is available only with your doctor's prescription.
Before using peginterferon alfa-2b
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For peginterferon alfa-2b, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to peginterferon alfa-2b or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies have not been performed on the relationship of age to the effects of Pegintron® in children younger than 3 years of age. Safety and efficacy have not been established.
Appropriate studies have not been performed on the relationship of age to the effects of Sylatron™ in the pediatric population. Safety and efficacy have not been established.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of peginterferon alfa-2b injection in the elderly. However, elderly patients are likely to be more sensitive to the effects of peginterferon alfa-2b, and are more likely to have age-related kidney problems, which may require caution and an adjustment in the dose for patients receiving peginterferon alfa-2b.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking peginterferon alfa-2b, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using peginterferon alfa-2b with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
Using peginterferon alfa-2b with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Caffeine Citrate
Interactions with food/tobacco/alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Other medical problems
The presence of other medical problems may affect the use of peginterferon alfa-2b. Make sure you tell your doctor if you have any other medical problems, especially:
- Allergic reactions (eg, anaphylaxis, bronchoconstriction, Stevens-Johnson syndrome) or
- Autoimmune hepatitis (liver inflammation) or
- Decompensated liver disease—Should not be used in patients with these conditions.
- Angina (severe chest pain) or
- Heart attack, history of or
- Heart or blood vessel disease or
- Heart rhythm problems (eg, arrhythmia, tachycardia), history of or
- Hypotension (low blood pressure)—Use with caution. Patients with these conditions should be closely monitored while using peginterferon alfa-2b.
- Bone marrow problems (eg, aplastic anemia) or
- Brain disease (eg, encephalopathy) or
- Breathing problems or other lung diseases (eg, COPD, pneumonia, pulmonary infiltrates, sarcoidosis), or history of or
- Depression or mental illness, history of or
- Diabetes mellitus or
- Diabetic retinopathy (eye problem caused by diabetes) or
- Eye or vision problems (eg, retinopathy, optic neuritis) or
- Hyperglycemia (high blood sugar level) or
- Hypertensive retinopathy (eye problem caused by high blood pressure) or
- Hypertriglyceridemia (high triglyceride levels or fats in the blood) or
- Kidney disease or
- Liver disease (including cirrhosis), severe or
- Psoriasis or
- Psychiatric problems, history of or
- Rheumatoid arthritis or
- Systemic lupus erythematosus or
- Thyroid disease or
- Type 1 diabetes—Use with caution. May make these conditions worse.
- Colitis (inflammation of the bowel) or
- Pancreatitis (inflammation of the pancreas)—Peginterferon alfa-2b should be stopped in patients with these conditions.
- Heart disease (severe and unstable), or history of or
- Kidney disease, severe or
- Sickle cell anemia (red blood cell disorder) or
- Thalassemia major (genetic blood disorder)—Peginterferon alfa-2b together with ribavirin should not be used in patients with these conditions.
- Organ transplant (eg, liver)—Use of peginterferon alfa-2b alone or in combination with ribavirin has not been studied in patients with this condition.
Proper use of peginterferon alfa-2b
A nurse or other trained health professional may give you or your child peginterferon alfa-2b. It is given as a shot under your skin, usually in the stomach, thigh, or upper arm. If you are very thin, it should only be given as a shot under the skin of your thigh or outer surface of your arm. You may also be taught how to give peginterferon alfa-2b at home. Make sure you understand all of the instructions before giving yourself an injection. Do not use more medicine or use it more often than your doctor tells you to.
If you use peginterferon alfa-2b at home, you will be shown the body areas where this shot can be given. Use a different body area each time you give yourself a shot. Keep track of where you give each shot to make sure you rotate body areas. This will help prevent skin problems from the injections. Do not inject into skin areas that are red, bruised, irritated, or infected, or have scars, stretch marks, or lumps.
Each package of peginterferon alfa-2b injection contains a Medication Guide and a patient instruction sheet. Read this sheet carefully and make sure you understand:
- How to prepare the injection.
- How to give the injection.
- How long the injection is stable for.
If you have any questions about any of this, check with your doctor.
Use only the brand of peginterferon alfa-2b that your doctor prescribed. Different brands may not work the same way.
Check the medicine in the pen or vial. It should look like a white to off-white tablet that is whole, or in pieces, or powdered. Gently swirl the pen or vial after adding water in it. Do not use the medicine if it is cloudy, discolored, or has particles in it. Do not shake.
Use the pen or vial only one time. Throw away any leftover medicine.
If you are using peginterferon alfa-2b at home, your doctor may tell you to inject the medicine at bedtime and to take a fever medicine (eg, acetaminophen, Tylenol®) 30 minutes before the injection. This helps prevent common "flu-like" symptoms such as fever, chills, headaches, muscle or joint pain, or tiredness. Also, drinking extra fluids may help if you experience these unwanted effects.
The dose of peginterferon alfa-2b will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of peginterferon alfa-2b. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For injection dosage form:
- For hepatitis C virus infection:
- Adults—Dose is based on body weight and must be determined by your doctor. It is usually between 40 and 150 micrograms (mcg) injected under the skin once a week (same time and day each week).
- Children 3 years of age and older—Dose is based on body weight and must be determined by your doctor.
- Children younger than 3 years of age—Use and dose must be determined by your doctor.
- For hepatitis C virus infection, in combination with ribavirin:
- Adults—Dose is based on body weight and must be determined by your doctor. It is usually between 50 and 150 micrograms (mcg) injected under the skin once a week (same time and day each week) and should be taken together with ribavirin capsules or solution 2 times a day.
- Children 3 years of age and older—Dose is based on body surface area and must be determined by your doctor. The dose is usually 60 micrograms per square meter (mcg/m) of body surface area injected under the skin once a week (same time and day each week) and should be taken together with ribavirin capsules or solution 2 times a day.
- Children younger than 3 years of age—Use and dose must be determined by your doctor.
- For treatment of melanoma:
- Adults—Dose is based on body weight and must be determined by your doctor. It is usually 6 micrograms (mcg) per kilogram (kg) of body weight injected under the skin once a week for 8 doses. This should be followed by a dose of 3 mcg/kg of body weight injected under the skin once a week for up to 5 years.
- Children—Use and dose must be determined by your doctor.
- For hepatitis C virus infection:
Peginterferon alfa-2b needs to be given on a fixed schedule. If you miss a dose or forget to use your medicine, call your doctor or pharmacist for instructions.
For patients with hepatitis C: Use a dose as soon as you remember if it is the same day or the next day. Then go back to your regular dosing schedule. If it has been several days since you have missed your dose, call your doctor or pharmacist for instructions. Do not use more than one injection in a week.
Store unopened vials of peginterferon alfa-2b at room temperature, away from heat and direct light. Do not freeze. An open vial of medicine must be used right away.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Store the PegIntron® Redipen® prefilled pen in the refrigerator. After mixing the medicine, use it right away. If you are unable to do this, the mixture may be stored in the refrigerator for 24 hours. Throw away any mixed medicine that has not been used within this time. Do not freeze the solution.
Throw away used needles in a hard, closed container that the needles cannot poke through. Keep this container away from children and pets.
Precautions while using peginterferon alfa-2b
It is very important that your doctor check your or your child's progress at regular visits to make sure that peginterferon alfa-2b is working properly. Blood and urine tests may be needed to check for unwanted effects.
Using PegIntron® alone or together with ribavirin while you are pregnant can harm your unborn baby. These medicines may also cause birth defects if the father is using it when his sexual partner becomes pregnant. Women should use an effective form of birth control during treatment and for 6 months after the last dose. Female partners of male patients should also use an effective form of birth control during treatment and for 6 months after the last dose. If a pregnancy occurs while you are using these medicines, tell your doctor right away.
A negative pregnancy test is needed in women who are of childbearing age before starting treatment with peginterferon alfa-2b together with ribavirin. Female patients must also have regular pregnancy tests during treatment with peginterferon alfa-2b together with ribavirin and for 6 months after stopping treatment.
Using Sylatron™ while you are pregnant can harm your unborn baby. Use an effective form of birth control during treatment with peginterferon alfa-2b and for at least 10 days after the last dose. If you think you have become pregnant while using peginterferon alfa-2b, tell your doctor right away.
Peginterferon alfa-2b can increase thoughts of suicide in people with or without a history of a mental illness. Peginterferon alfa-2b may also cause relapse in people with a history of substance abuse. Tell your doctor right away if you start to feel more depressed or exhibit aggressive behavior. Also tell your doctor right away if you have thoughts of hurting yourself. Report any unusual thoughts or behaviors that trouble you, especially if they are new or get worse quickly. Make sure your caregiver knows if you have trouble sleeping, get upset easily, have a big increase in energy, or start to act reckless. Also tell your doctor if you have sudden or strong feelings, such as feeling nervous, angry, restless, violent, or scared. If you, your child, or your caregiver notice any of these side effects during treatment and for up to 6 months after treatment, tell your doctor or your child's doctor right away.
Peginterferon alfa-2b may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you have itching, hives, hoarseness, trouble with breathing or swallowing, or any swelling of the hands, face, or mouth while you or your child are using peginterferon alfa-2b.
Serious allergic reactions can occur with peginterferon alfa-2b. Check with your doctor right away if you have blistering, peeling, or loosening of the skin, fever or chills, hives or welts, red skin lesions, severe acne or skin rash, or sores or ulcers on the skin while you or your child are using peginterferon alfa-2b.
Check with your doctor right away if blurred vision, difficulty in reading, eye pain, or any other change in vision occurs during or after treatment. Your doctor may want you to have your eyes checked by an ophthalmologist (eye doctor).
Peginterferon alfa-2b injection combined with ribavirin can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets in the blood, which are necessary for proper blood clotting. If this occurs, there are certain precautions you or your child can take, especially when your blood count is low, to reduce the risk of infection or bleeding:
- If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.
- Check with your doctor immediately if you notice any unusual bleeding or bruising, black, tarry stools, blood in the urine or stools, or pinpoint red spots on your skin.
- Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.
- Do not touch your eyes or the inside of your nose unless you have just washed your hands and have not touched anything else in the meantime.
- Be careful not to cut yourself when you are using sharp objects such as a safety razor or fingernail or toenail cutters.
- Avoid contact sports or other situations where bruising or injury could occur.
Check with your doctor right away if you or your child have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.
Peginterferon alfa-2b injection when used together with ribavirin may cause teeth and gum problems. These medicines may cause dryness of the mouth, and a dry mouth may damage your teeth and gums if you take these medicines for a long time. To help prevent this condition, carefully brush your teeth at least two times a day and have regular visits with your dentist. For temporary relief of mouth dryness, use sugarless candy or gum, melt bits of ice in your mouth, or use a saliva substitute.
Check with your doctor right away if you or your child have symptoms that could lead to pancreatitis (swelling of the pancreas). This includes sudden and severe stomach pain, chills, constipation, nausea, vomiting, fever, or lightheadedness.
Children who use peginterferon alfa-2b and ribavirin combination may have weight loss and slowed growth. Most children have a growth spurt and gain weight after treatment ends. If you have questions about this, talk to your doctor.
Peripheral neuropathy may occur if you use peginterferon alfa-2b together with telbivudine (Tyzeka®). Check with your doctor right away if you or your child are having burning, numbness, tingling, or painful sensations in the arms, hands, legs, or feet.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.
Peginterferon alfa-2b side effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
- black, tarry stools
- blood in the urine or stools
- bloody diarrhea
- cloudy urine
- difficult or labored breathing
- lower back or side pain
- mood swings
- painful or difficult urination
- pale skin
- pinpoint red spots on the skin
- stomach pain
- tightness in the chest
- trouble sleeping
- troubled breathing with exertion
- unusual bleeding or bruising
- unusual tiredness or weakness
- Changes in menstrual cycle
- dry hair and skin
- sensitivity to cold
- weight gain
- Aching, pain, or stiffness in the joints
- aggressive behavior
- attempts to kill yourself
- chest pain (severe)
- cool, pale skin
- decrease in vision
- difficulty with speaking
- drug addiction or overdose
- eye pain
- fast, irregular, pounding, or racing heartbeat or pulse
- feeling of constant movement of self or surroundings
- loss of appetite
- muscle weakness
- numbness or loss of feeling in one or both limbs on the same side of the body
- possible decrease in the amount of urine
- rash, hives, or itching
- sensation of spinning
- sensitivity to heat
- sensitivity to sunlight
- sweating (excessive)
- thick, scaly skin
- thoughts of killing someone or yourself
- warm, smooth, or moist skin
- weight loss
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- Aching, fullness, or tension in the sinuses
- bruising, irritation, or itching at the injection site
- burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
- change in taste
- difficulty with moving
- feeling of warmth
- hair loss
- loss of taste
- muscle pain or stiffness
- pain in the bones or muscles
- redness of the face, neck, arms and occasionally, upper chest
- runny nose
- sore throat
- thinning of the hair
- Muscle rigidity or stiffness
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
More about peginterferon alfa-2b
- Side effects
- Drug interactions
- Dosage information
- During pregnancy
- Reviews (1)
- En español
- Drug class: antineoplastic interferons
Related treatment guides
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.