Sofosbuvir is used with other antiviral medications such as ribavirin and peginterferon to treat chronic (long-lasting) hepatitis C, a viral infection of the liver. Sofosbuvir belongs to a class of antivirals known as polymerase inhibitors. It works by reducing the amount of hepatitis C virus in your body, which may help your liver recover. Chronic hepatitis C infection can cause serious liver problems such as scarring (cirrhosis), or liver cancer.
Sofosbuvir in combination with other antiviral medications reduces the amount of hepatitis C virus in the body and helps the body's immune system fight the infection. It is not known if this treatment can prevent you from passing the virus to others. Do not share needles, and practice "safe sex" (including the use of latex condoms) to lower the risk of passing the virus to others
Sofosbuvir must be used in combination treatment to have the best effect. Taking it by itself can make your treatment less effective.
Read the Patient Information Leaflet if available from your pharmacist before you start taking sofosbuvir and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication by mouth with or without food as directed by your doctor, usually once daily. The dosage is based on your medical condition and response to treatment.
This medication works best when the amount of drug in your body is kept at a constant level. Therefore, take this drug at evenly spaced intervals. To help you remember, take it at the same time each day.
Continue to take sofosbuvir for the full length of time prescribed, even if your symptoms disappear after a short time. Stopping the medication too early may result in a return of the infection.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: signs of low red blood cell count (such as unusual tiredness, rapid breathing, pale skin, shortness of breath, fast heartbeat).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking sofosbuvir, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease/failure.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Sofosbuvir, in combination with ribavirin or peginterferon, must not be used during pregnancy by either the pregnant woman or her male partner. The combination may harm an unborn baby. Two reliable forms of birth control must be used whenever at least one sexual partner is using these medicines, and for six months after stopping treatment (see also Drug Interactions section). If you or your partner becomes pregnant, or if you think you or your partner may be pregnant, tell your doctor immediately.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Other medications can affect the removal of sofosbuvir from your body, which may affect how sofosbuvir works. Examples include rifamycins (such as rifabutin), St. John's wort, tipranavir/ritonavir, drugs used to treat seizures (such as carbamazepine, phenytoin), among others.
This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
Laboratory and/or medical tests (such as liver function tests, hepatitis C virus RNA levels) will be performed before you start treatment, periodically to monitor your progress, or to check for side effects. Consult your doctor for more details.
It is recommended that female patients or female partners of male patients take a pregnancy test before starting this medication. A pregnancy test should also be taken every month while using this medication and for 6 months after treatment ends to make sure no pregnancy occurs.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store at room temperature away from light and moisture in the original container. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised December 2013. Copyright(c) 2013 First Databank, Inc.
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