Generic Name: cobicistat (koe BIK i stat)
Brand Name: Tybost
What is cobicistat?
Cobicistat is used to increase your blood levels of these medicines, helping to make them safer and more effective at lower doses.
When given with atazanavir, cobicistat is for use in adults and in children who weigh at least 77 pounds (35 kilograms). When given with darunavir, cobicistat is for use only in adults.
Cobicistat is not an antiviral medicine and will not treat HIV or AIDS. Cobicistat is given only to help increase your blood levels of atazanavir or darunavir.
Cobicistat may also be used for purposes not listed in this medication guide.
Cobicistat is not a complete treatment and must be used in combination only with atazanavir or darunavir.
Tell your doctor about all your current medicines and any you start or stop using. Many drugs can interact with cobicistat and cause dangerous effects that could lead to death.
Before taking this medicine
Cobicistat is not a complete treatment and must be used in combination only with atazanavir or darunavir. You should not take cobicistat with any other antiviral medicines that your doctor has not prescribed.
You should not take cobicistat if you are allergic to it.
Many drugs can interact and cause dangerous effects that could lead to death. Some drugs should not be used together.
You should not take cobicistat with atazanavir if you also take:
You should not take cobicistat with atazanavir or darunavir if you also take:
You may not be able to take cobicistat if you also take:
darunavir 600 milligrams twice daily; or
certain other antiviral medicines--fosamprenavir, saquinavir, or tipranavir.
Tell your doctor if you have ever had:
You should not take cobicistat if you are pregnant. Cobicistat or your other medicines may not work as well during pregnancy. Your doctor may prescribe different antiviral medications if you become pregnant while taking cobicistat.
Use your medications properly to control your infection during pregnancy. HIV can be passed to your baby if the virus is not controlled during pregnancy. Your name may be listed on a registry to track any effects of antiviral medicine on the baby.
Women with HIV or AIDS should not breastfeed a baby. Even if your baby is born without HIV, the virus may be passed to the baby in your breast milk.
How should I take cobicistat?
Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.
Cobicistat is usually taken once per day with atazanavir or darunavir.
Take your HIV medicines with food at the same time each day to be sure you do not miss a dose.
If you take cobicistat with atazanavir and you also take medicine to reduce stomach acid, follow these recommendations unless your doctor tells you otherwise:
If you take an antacid, take it at least 2 hours before or 2 hours after you take cobicistat and atazanavir.
If you take a medicine such as cimetidine, ranitidine, Tagamet, Axid, Zantac, Pepcid, and others: Take the stomach medicine at the same time you take cobicistat and atazanavir; or wait at least 10 hours after taking the stomach medicine to take your cobicistat and atazanavir doses.
If you take a proton pump inhibitor such as omeprazole, esomeprazole, Nexium, Prevacid, Prilosec, Protonix: Wait at least 12 hours after taking the stomach medicine to take your cobicistat and atazanavir doses.
While using cobicistat, your blood may need to be tested often. Your kidney function may also need to be tested.
Use all HIV medications as directed and read all medication guides you receive. Do not change your dose or dosing schedule without your doctor's advice. Every person with HIV should remain under the care of a doctor.
Store in the original container at room temperature, away from moisture and heat. Keep the bottle tightly closed when not in use.
What happens if I miss a dose?
Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.
Get your prescription refilled before you run out of medicine completely.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking cobicistat?
Using cobicistat will not prevent your disease from spreading. Do not have unprotected sex or share razors or toothbrushes. Talk with your doctor about safe ways to prevent HIV transmission during sex. Sharing drug or medicine needles is never safe, even for a healthy person.
Cobicistat side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
kidney problems--little or no urination, swelling in your feet or ankles, feeling tired or short of breath; or
liver problems--upper stomach pain, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Common side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Cobicistat dosing information
Usual Adult Dose for HIV Infection:
150 mg orally once a day with food
-This drug must be used with atazanavir or darunavir; the manufacturer product information for these agents should be consulted.
-This drug may be used with atazanavir (300 mg orally once a day) in therapy-naive and therapy-experienced patients.
-This drug may be used with darunavir (800 mg orally once a day) in therapy-naive patients and therapy-experienced patients with no darunavir resistance associated substitutions.
-This drug is not interchangeable with ritonavir and should not be used with darunavir 600 mg twice a day, fosamprenavir, saquinavir, or tipranavir.
Use: To increase systemic exposure of atazanavir or darunavir in combination with other antiretrovirals in the treatment of HIV-1 infection
What other drugs will affect cobicistat?
When you start or stop taking cobicistat, your doctor may need to adjust the doses of any other medicines you take on a regular basis.
Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.
Tell your doctor about all your current antiviral medicines.
Many drugs can affect cobicistat, and some drugs should not be used at the same time. Tell your doctor about all your current medicines and any medicine you start or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 3.01.
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More about cobicistat
- Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- En Español
- Drug class: antiviral boosters
Other brands: Tybost