Compare Epivir vs. Pegasys

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Works with other medicines to treat HIV infection or chronic hepatitis B.

Epivir (lamivudine) is a first-choice and commonly used medicine to take together with other HIV medications to treat HIV. It is also an alternative option for treating chronic hepatitis B.

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Upsides
  • Epivir (lamivudine) can be used with many other HIV options to create a combination that's right for you.
  • Has very minimal interactions with other medications.
  • Available in tablet and liquid form.
  • Can be take once or twice a day. Also available in different combination pills so you don't have to take as many pills per day.
  • Available in cheaper generic form.
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Downsides
  • Cannot take Epivir (lamivudine) by itself to treat HIV.
  • Might need to change dosage based on how well your kidneys function.
  • It is recommended to use other options to treat chronic hepatitis B before choosing Epivir (lamivudine) due to drug resistance.
  • You'll have to be tested for both HIV and hepatitis B, since the dose to treat hepatitis B is lower than the dose for HIV. If you have the lower dose, HIV can be harder to treat if you also have hepatitis B.
  • The liquid version of Epivir (lamivudine) has sugar, so if you have diabetes, your blood sugar levels might change.
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Used for
  • HIV infection
  • Hepatitis B
  • HIV prevention, non-occupational (PEP)
  • HIV prevention, mother-to-child
  • Active type B viral hepatitis
  • Chronic Hepatitis C
  • Chronic
  • In patients with compensated liver disease - HIV infection Hepatitis C
  • Chronic
  • Interferon alfa-naive
  • With compensated liver disease
  • Hepatitis C
  • Chronic
  • Interferon alfa/ribavirin nonresponders
Dosage forms
  • Pill
  • Liquid
  • Injection
Price
Lowest price
$1611.03
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Lowest price
$4031.59
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Reviews
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Side effects
3possible side effects
  • Ear, nose, and throat infections
    25%
  • Diarrhea
    14%
  • Sore throat
    13%
See more detailed side effects
The Pegasys (Peginterferon Alfa-2A) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Lactic acidosis | Enlarged, fatty liver
    • Liver disease
    • Women
    • Obesity
  • Acute Exacerbation of Hepatitis B Virus (HBV)
    • Hepatitis B virus
  • Different doses available
  • HIV counseling/testing
  • Immune reconstitution syndrome
    • HIV
    • Exposure to other infections
    • Start of a new HIV medication
    • Change in HIV therapy
  • Pancreatitis
See more detailed risks and warnings
No information currently available