Tenofovir Disoproxil FumarateBrand Name: Viread Other Names: TDF, tenofovir DF Drug Class: Nucleoside Reverse Transcriptase Inhibitors
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Tenofovir disoproxil fumarate (tenofovir DF) can cause serious, life-threatening side effects. These include(buildup of lactic acid in the blood) and severe problems.
Contact your health care provider right away if you have any of the following symptoms that could be signs of lactic acidosis:
- Feeling very weak or tired.
- Unusual muscle pain.
- Trouble breathing.
- Stomach pain with either nausea or vomiting.
- Feeling cold, especially in your arms and legs.
- Feeling dizzy or lightheaded.
- Fast or irregular heartbeat.
- Yellowing of your skin or the whites of your eyes ( ).
- Dark-colored urine.
- Light-colored bowel movements.
- Loss of appetite for several days or longer.
- Stomach pain.
If you have both HIV andB (HBV) and take tenofovir DF, your HBV infection may get much worse (flare up) if you stop taking tenofovir DF. The HBV drug adefovir dipivoxil (brand name: Hepsera) should not be taken with tenofovir DF.
While taking tenofovir DF, it is important to keep all of your appointments with your health care provider.
What is tenofovir disoproxil fumarate?
Tenofovir DF is a prescription medicine approved by the U.S.(FDA) for the treatment of HIV in adults and children 2 years of age and older. Tenofovir DF is always used in combination with other HIV medicines.
Tenofovir DF belongs to a class (group) of HIV drugs calledinhibitors (NRTIs). NRTIs block an HIV called reverse transcriptase. (An enzyme is a that starts or increases the speed of a chemical reaction.) By blocking reverse transcriptase, NRTIs prevent HIV from multiplying and can reduce the amount of HIV in the body.
HIV medicines can’t cure HIV/AIDS, but taking a combination of HIV medicines (called an HIV regimen) every day helps people with HIV live longer, healthier lives. HIV medicines also reduce the risk of HIV. If you are taking HIV medicines, including tenofovir DF, don’t cut down on, skip, or stop taking them unless your health care provider tells you to.
Tenofovir DF is also effective against HBV and approved by FDA for the treatment of chronic HBV infection in adults and children 12 years of age and older. For information on the HBV-related use of tenofovir DF in people with HIV, please refer to the HBV section of the Guidelines for the Prevention and Treatment of Opportunistic Infections in HIV-Infected Adults and Adolescents.
What should I tell my health care provider before taking tenofovir disoproxil fumarate?
Before taking tenofovir DF, tell your health care provider:
- If you are allergic to tenofovir DF or any other medicines.
- If you have liver problems, including HBV infection.
- If you have kidney problems.
- If you have bone problems.
- If you have any other medical conditions.
- If you are pregnant or plan to become pregnant. Whether tenofovir DF can harm an unborn baby is unknown. Tenofovir DF should be used during pregnancy only if clearly needed. Talk to your health care provider about possible risks with taking tenofovir DF when pregnant.
- If you are breastfeeding or plan to breastfeed. Do not breastfeed if you are infected with HIV or are taking tenofovir DF.
- If you are using -based birth control (such as pills, injections, or implants).
- About other prescription and nonprescription medicines, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Tenofovir DF may affect the way other medicines or products work, and other medicines or products may affect how tenofovir DF works. Taking tenofovir DF together with certain medicines or products may cause serious, life-threatening side effects.
How should I take tenofovir disoproxil fumarate?
Tenofovir DF (brand name: Viread) comes in the following forms and strengths:
- 150-mg tablets.
- 200-mg tablets.
- 250-mg tablets.
- 300-mg tablets.
- Oral powder (40 mg of tenofovir DF per 1 g of powder).
Take tenofovir DF according to your health care provider’s instructions.
Tenofovir DF tablets should be swallowed whole and can be taken with or without food. People who are unable to swallow the tablets whole may take the oral powder. Use the provided dosing scoop to measure the oral powder. Mix the oral powder with soft foods that can be swallowed without chewing, such as applesauce, baby food, or yogurt. Take theof oral powder right after mixing it. Do not mix the oral powder with liquid.
Always take tenofovir DF in combination with other HIV medicines.
If you take too much tenofovir DF, contact your health care provider or local poison control center (1-800-222-1222) right away, or go to the nearest hospital emergency room.
For more information on how to take tenofovir DF, see the FDA drug label from DailyMed. (DailyMed is a federal website that includes the most recent drug labels submitted to FDA.)
What should I do if I forget a dose?
If you miss a dose of tenofovir DF, take the missed dose as soon as you remember it. But if it is almost time for your next dose, skip the missed dose and just take your next dose at the regular time. Do not take two doses at the same time to make up for a missed dose.
What side effects can tenofovir disoproxil fumarate cause?
Tenofovir DF may cause side effects. Most side effects from tenofovir DF are manageable, but a few can be serious. Serious side effects of tenofovir DF include lactic acidosis (buildup of lactic acid in the blood) and severe liver problems. (See the WARNING above.)
Other possible side effects of tenofovir DF include:
- New or worsening kidney problems, including kidney failure.
- Bone problems, including bone pain, softening, or thinning ( ), which may lead to fractures.
- Changes in body fat (including gain or loss of fat).
- (IRIS), a condition that sometimes occurs when the begins to recover after treatment with an HIV medicine. As the immune system gets stronger, it may have an increased response to a previously hidden infection.
Tell your health care provider if you have any side effect that bothers you or that does not go away.
These are not all the possible side effects of tenofovir DF. To learn more about possible side effects of tenofovir DF, read the drug label oror talk to your health care provider or pharmacist.
The AIDSinfo fact sheet on HIV Medicines and Side Effects also includes information that may apply to tenofovir DF.
You can also report side effects to FDA at 1-800-FDA-1088 (1-800-332-1088) or online at https://www.accessdata.fda.gov/scripts/medwatch/.
How should tenofovir disoproxil fumarate be stored?
- Store tenofovir DF at room temperature, 68°F to 77°F (20°C to 25°C).
- Keep tenofovir DF in the container that it came in and keep the container tightly closed. If the container has a small packet of drying agent (called a desiccant), do not remove it. The desiccant protects the medicine from moisture.
- Do not use tenofovir DF if the original seal over the container opening is broken or missing.
- Throw away tenofovir DF that is no longer needed or expired (out of date). Follow FDA guidelines on how to safely dispose of unused medicine.
- Keep tenofovir DF and all medicines out of reach of children.
Where can I find more information about tenofovir disoproxil fumarate?
More information about tenofovir DF is available:
- The tenofovir DF drug label, from DailyMed. The Patient Counseling Information section of the label includes information for people taking tenofovir DF.
- Recommendations on the HBV-related use of tenofovir DF in people with HIV, from the Guidelines for the Prevention and Treatment of Opportunistic Infections in HIV-Infected Adults and Adolescents, prepared by the Centers for Disease Control and Prevention (CDC), the (NIH), and the HIV Medicine Association of the Diseases Society of America (IDSA-HIVMA).
- Tenofovir DF-related research studies, from the AIDSinfo database of study summaries.
- A list of FDA-approved HIV medicines, from AIDSinfo.
Gilead Sciences, Inc.
Main number: 800-445-3235
Patient assistance: 800-226-2056
The above Patient Version drug summary is based on the following FDA label(s): Powder, tablet (coated).
Last Reviewed: May 6, 2016