What is Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide) and how is it used?
Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide) is a prescription medicine that is used without other anti-HIV-1 medicines to treat Human Immunodeficiency Virus-1 (HIV-1) in adults and children who weigh at least 55 pounds (25 kg):
- who have not received anti-HIV-1 medicines in the past, or
- to replace their current anti-HIV-1 medicines for people whose healthcare provider determines that they meet certain requirements.
HIV-1 is the virus that causes Acquired Immune Deficiency Syndrome (AIDS).
Biktarvy contains the medicines bictegravir, emtricitabine, and tenofovir alafenamide.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, antacids, laxatives, vitamins, and herbal supplements.
Some medicines may interact with Biktarvy. Keep a list of your medicines and show it to your healthcare provider and pharmacist when you get a new medicine.
You can ask your healthcare provider or pharmacist for a list of medicines that interact with Biktarvy.
Do not start a new medicine without telling your healthcare provider. Your healthcare provider can tell you if it is safe to take Biktarvy with other medicines.
What are the most important side effects and other facts about Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)?
WARNING
Post Treatment Acute Exacerbation of Hepatitis B
Severe acute exacerbations of hepatitis B have been reported in patients who are coinfected with HIV-1 and HBV and have discontinued products containing emtricitabine (FTC) and/or tenofovir disoproxil fumarate (TDF), and may occur with discontinuation of Biktarvy.
Closely monitor hepatic function with both clinical and laboratory follow-up for at least several months in patients who are coinfected with HIV-1 and HBV and discontinue Biktarvy. If appropriate, anti-hepatitis B therapy may be warranted.
Biktarvy can cause serious side effects, including:
- Worsening of Hepatitis B virus infection. If you have hepatitis B virus (HBV) infection and take Biktarvy, your HBV may get worse (flare-up) if you stop taking Biktarvy. A “flare-up” is when your HBV infectionsuddenly returns in a worse way than before.
- Do not run out of Biktarvy. Refill your prescription or talk to your healthcare provider before your Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)is all gone.
- Do not stop taking Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)without first talking to your healthcare provider. If you stop taking Biktarvy, your healthcare provider will need to check your health often and do blood tests regularly for several months to check your HBV infection. Tell your healthcare provider about any new or unusual symptoms you may have after you stop taking Biktarvy.
Other side effects of Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)
Biktarvy may cause serious side effects, including:
- Changes in your immune system (Immune Reconstitution Syndrome) can happen when you start taking HIV-1 medicines. Your immune system may get stronger and begin to fight infections that have been hidden in your body for a long time. Tell your healthcare provider right away if you start having any new symptoms after starting your HIV-1 medicine.
- New or worse kidney problems, including kidney failure. Your healthcare provider should do blood and urine tests to check your kidneys when starting and during treatment with Biktarvy. Your healthcare provider may tell you to stop taking Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)if you develop new or worse kidney problems.
- Too much lactic acid in your blood (lactic acidosis). Too much lactic acid is a serious but rare medical emergency that can lead to death. Tell your healthcare provider right away if you get these symptoms: weakness or being more tired than usual, unusual muscle pain, being short of breath or fast breathing, stomach pain with nausea and vomiting, cold or blue hands and feet, feel dizzy or lightheaded, or a fast or abnormal heartbeat.
- Severe liver problems. In rare cases, severe liver problems can happen that can lead to death. Tell your healthcare provider right away if you get these symptoms: skin or the white part of your eyes turns yellow, dark “tea-colored” urine, light-colored stools, loss of appetite for several days or longer, nausea, or stomach-area pain.
What is the dosage for Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)?
- Take Biktarvy exactly as your healthcare provider tells you to take it. Biktarvy is taken by itself (not with other HIV-1 medicines) to treat HIV-1 infection.
- Take Biktarvy 1 time each day with or without food.
- Do not change your dose or stop taking Biktarvy without first talking with your healthcare provider. Stay under a healthcare provider’s care during treatment with Biktarvy.
- If you take antacids that contain aluminum or magnesium, take Biktarvy at least 2 hours before or 6 hours after you take these antacids.
- If you take supplements or antacids that contain iron or calcium, take Biktarvy with food at the same time that you take these supplements or antacids.
- Do not miss a dose of Biktarvy.
- If you take too much Biktarvy, call your healthcare provider or go to the nearest hospital emergency room right away.
- When your Biktarvy supply starts to run low, get more from your healthcare provider or pharmacy. This is very important because the amount of virus in your blood may increase if the medicine is stopped for even a short time. The virus may develop resistance to Biktarvy and become harder to treat.
Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide) Contraindications, Pregnancy Safety and Drug Interactions
Before taking Biktarvy, tell your healthcare provider about all your medical conditions, including if you:
- have liver problems, including hepatitis B virus infection
- have kidney problems
- are pregnant or plan to become pregnant. It is not known if Biktarvy can harm your unborn baby. Tell your healthcare provider if you become pregnant during treatment with Biktarvy.
- are breastfeeding or plan to breastfeed. Do not breastfeed if you take Biktarvy.
Pregnancy Registry: There is a pregnancy registry for women who take Biktarvy during pregnancy. The purpose of this registry is to collect information about the health of you and your baby. Talk with your healthcare provider about how you can take part in this registry.
You should not breastfeed if you have HIV-1 because of the risk of passing HIV-1 to your baby.
At least one of the medicines in Biktarvy can pass to your baby in your breast milk. It is not known if the other medicines in Biktarvy (bictegravir, emtricitabine, and tenofovir alafenamide)can pass into your breast milk.
Talk with your healthcare provider about the best way to feed your baby.
It is not known if Biktarvy is safe and effective in children who weigh less than 55 pounds (25 kg).
Do not take Biktarvy if you also take a medicine that contains:
- dofetilide
- rifampin