CobicistatBrand Name: Tybost Other Names: COBI Drug Class: Pharmacokinetic Enhancers (CYP3A Inhibitors)
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What are the most important things to know about cobicistat?
Some drugs should not be taken with cobicistat. Cobicistat may interact with many drugs, which can cause serious, life-threatening side effects.
When taken with certain other medicines, cobicistat can make existing kidney problems worse. It can also cause new kidney problems, including kidney failure. Your health care provider should check yourbefore you start and while you are taking cobicistat.
If you are taking cobicistat, tell your health care provider about other prescription and nonprescription medicines, vitamins, nutritional supplements, and herbal products (including St. John's wort) you are taking or plan to take.
While taking cobicistat, it is important to keep all of your appointments with your health care provider.
What is cobicistat?
Cobicistat is a type of medicine called a pharmacokinetic enhancer. atazanavir or darunavir, cobicistat interferes with the breakdown of the drugs in the body. In this way, cobicistat increases the blood levels of atazanavir or darunavir, making them more effective.are used in HIV treatment to increase the amount of other HIV medicines in the blood. When used with
Cobicistat is not an HIV medicine and does not treat HIV. Even if you take cobicistat and atazanavir or darunavir, you must also take all the HIV medicines prescribed by your health care provider. Do not cut down on, skip, or stop taking cobicistat or any HIV medicines unless your health care provider tells you to.
What should I tell my health care provider before taking cobicistat?
Before taking cobicistat, tell your health care provider:
- If you are allergic to cobicistat, atazanavir, darunavir, or any other medicines.
- If you have kidney problems.
- If you have problems.
- If you have any other medical conditions.
- If you are pregnant or plan to become pregnant. Cobicistat should not be used during pregnancy. Talk to your health care provider about possible risks with taking cobicistat when pregnant.
- If you are breastfeeding or plan to breastfeed. Do not breastfeed if you have HIV or are taking cobicistat.
- If you are using HIV and Birth Control infographic. -based birth control (such as pills, implants, or vaginal rings). How hormone-based birth control interacts with cobicistat is unknown. Your health care provider can help you decide how to adjust your birth control while you are taking cobicistat. For more information about using birth control and HIV medicines at the same time, view the
- About other prescription and nonprescription medicines, vitamins, nutritional supplements, and herbal products (particularly St. John's wort) you are taking or plan to take. Cobicistat may affect the way other medicines or products work, and other medicines or products may affect how cobicistat works. Taking cobicistat together with atazanavir or darunavir, along with certain other medicines can lead to severe or life threatening side effects, or death. Keep a list of your medicines and show it to your health care provider and pharmacist when you get a new medicine.
How should I take cobicistat?
Cobicistat (brand name: Tybost) comes in tablet form. Each tablet contains 150 mg of cobicistat.
Take cobicistat according to your health care provider’s instructions.
Do not run out of cobicistat. HIV may become resistant to the HIV medicines atazanavir and darunavir if cobicistat is stopped even for a short time. When your supply starts to run low, get more from your health care provider or pharmacy.
Take cobicistat with food.
If you take too much cobicistat, 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 cobicistat, see the FDA drug label.
What should I do if I forget a dose?
If you miss aof cobicistat, 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 the missed dose.
What side effects can cobicistat cause?
Cobicistat may cause side effects. Many side effects from HIV medicines, such as nausea or occasional dizziness, are manageable. See the AIDSinfo fact sheet on HIV Medicines and Side Effects for more information that may apply to cobicistat.
Some side effects of cobicistat can be serious. When taken with certain other medicines, cobicistat can make existing kidney problems worse. It can also cause new kidney problems, including kidney failure. (See section above: What are the most important things to know about cobicistat?)
The most common side effects of cobicistat with atazanavir include yellowing of the skin or whites of your eyes ( ) and rash.
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 cobicistat. To learn more about possible side effects of cobicistat, read the drug label oror talk to your health care provider or pharmacist.
You can report side effects to FDA at 1-800-FDA-1088 (1-800-332-1088) or online.
How should cobicistat be stored?
- Store cobicistat at room temperature, 68°F to 77°F (20°C to 25°C).
- Keep cobicistat 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 cobicistat if the original seal over the container opening is broken or missing.
- Throw away cobicistat that is no longer needed or expired (out of date). Follow FDA guidelines on how to safely dispose of unused medicine.
- Keep cobicistat and all medicines out of reach of children.
Where can I find more information about cobicistat?
More information about cobicistat is available:
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): Tablet (film coated).
Last Reviewed: November 16, 2018