Compare Viread vs. Videx

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

Works with other medicines to treat HIV infection. Also treats Hepatitis B Virus.

Viread (tenofovir) is a first-line choice to be used in combination with other medications to treat HIV. Viread (tenofovir) is also a first-line choice in treating HBV.

Works with other medicines to treat HIV infection.

Videx (didanosine) is not a first-choice treatment for HIV because there are newer medications that work well and are easier to take. However, Videx (didanosine) can be an option if other HIV medications haven't worked for you.

  • Can be used with other medications to prevent HIV infection after an exposure.
  • Taken only once daily, with or without food.
  • There are newer formulations of Viread (tenofovir) available that are safer on your kidneys.
  • If tablets are hard for you to swallow, Viread (tenofovir) is available in a powder that's mixed with soft foods.
  • Videx (didanosine) is available in pill or liquid form.
  • Videx (didanosine) can be used in children 2 weeks of age and older.
  • Videx (didanosine) can be taken either once or twice daily.
  • Viread (tenofovir) can't be used on its own to treat HIV infection.
  • Not recommended for patients with kidney damage.
  • Can weaken your bones.
  • Might worsen hepatitis B infections if you suddenly stop taking it.
  • Videx (didanosine) cannot be taken by itself. It must be used with other HIV medications to treat HIV.
  • People commonly experience side effects such as diarrhea, nerve pain, and nausea when taking Videx (didanosine).
  • Videx (didanosine) should be used with caution if you have liver or kidney issues.
  • Videx (didanosine) shouldn't be taken with allopurinol or ribavirin. If you are taking these medicines, let your doctor know.
Used for
Dosage forms
  • Pill
  • Powder
  • Delayed release Pill
  • Liquid
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Side effects
1possible side effects
  • Nausea
See more detailed side effects
6possible side effects
  • Diarrhea
  • Nerve pain
  • Nausea
  • Headache
  • Rash
  • Vomiting
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Risks and risk factors
  • Lactic acidosis | Enlarged, fatty liver
    • Liver disease
    • Women
    • Obesity
  • Cannot be used to treat Hepatitis B Virus (HBV)
    • Hepatitis B Virus infection
  • Mood and behavior changes
    • History of mental illness
  • Decreased bone mineral density
    • History of bone fractures
    • Osteoporosis
  • Kidney damage
    • History of kidney damage
    • Concurrent use of other drugs known to harm kidneys
  • Hypersensitivity (allergic) reactions
    • Prior severe allergic reaction to Viread (tenofovir) or any of its individual drug components.
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  • Pancreatitis
    • History of pancreatic issues
    • Alcohol consumption
    • Concomitant use with Zerit (stavudine)
    • Kidney problems
  • Lactic acidosis & severe liver damage
  • Nerve pain
    • Advanced HIV disease
    • History of peripheral neuropathy
    • Taking other medications that also cause peripheral neuropathy
  • Retinal changes
  • Fat redistribution
    • HIV treatment
  • Immune reconstitution syndrome
    • HIV
    • Exposure to other infections
    • Start of a new HIV medication
    • Change in HIV therapy
See more detailed risks and warnings