Tenofovir (By mouth)
Tenofovir Disoproxil Fumarate (ten-OF-oh-vir dye-soe-PROX-il FUE-ma-rate)
Treats HIV infection and hepatitis B virus (HBV). HIV causes AIDS. This medicine does not cure HIV or AIDS, but combinations of drugs may slow the progress of the disease.
When This Medicine Should Not Be Used
How to Use This Medicine
- Your doctor will tell you how much medicine to use. Do not use more than directed.
- Tenofovir is used with other medicines to treat HIV infection. Take all other medicines your doctor has prescribed as part of your combination treatment.
- Oral powder:
- Measure the oral powder with the dosing scoop that comes with the package.
- Mix the oral powder with 2 to 4 ounces of soft food (such as applesauce, baby food, yogurt).
- Swallow this mixture right away. You are less likely to have a bitter taste if you take it as soon as it is mixed.
- Do not mix the oral powder with a liquid. The powder will not mix correctly and will float on top.
- Do not store the scoop inside the package with the powder.
- Do not stop using this medicine without checking first with your doctor. If you stop the medicine even briefly, the virus may become harder to treat. Contact your doctor or pharmacist when your supply is running low so you do not run out.
- Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.
- Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep the bottle tightly closed. Keep the medicine in the original bottle that you were given at the pharmacy.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Some foods and medicines can affect how tenofovir works. Tell your doctor if you are using adefovir, acyclovir, atazanavir, cidofovir, darunavir, ritonavir, didanosine, ganciclovir, lopinavir, valacyclovir, valganciclovir, an antibiotic, or an NSAID pain medicine.
Warnings While Using This Medicine
- Tell your doctor if you are pregnant, or if you have kidney disease, liver disease, or bone problems (such as osteoporosis).
- Do not breastfeed. You can spread HIV or AIDS to your baby through your breast milk.
- This medicine may cause the following problems:
- Lactic acidosis
- Severe liver problems
- Worsening of hepatitis B infection, when treatment is stopped
- Kidney problems
- Lower bone mineral density
- Your immune system may get stronger when you start taking this medicine. This could cause a hidden infection in your body to become active. Tell your doctor right away if you notice any changes in your health.
- This medicine will not keep you from giving HIV to others. Always practice safe sex, even if your partner also has HIV. Do not share needles or other items that may have blood or body fluids on them.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Bone, muscle, or joint pain
- Dark urine or pale stools, nausea, vomiting, loss of appetite, stomach pain, yellow skin or eyes
- Decrease in how much or how often you urinate
- Fast breathing, trouble breathing, nausea and vomiting, lightheadedness, severe weakness, tiredness, or confusion
If you notice these less serious side effects, talk with your doctor:
- Anxiety or depression
- Back pain
- Gaining weight around your neck, upper back, breast, face, or waist
- Mild rash
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088
- Last reviewed on 10/12/2016
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