Cobicistat-tabletter för HIV
Tybost
Granskad av Sid DajaniSenast uppdaterad av Michael Stewart, MRPharmSSenast uppdaterad 20 Jul 2022
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Cobicistat is one of a number of medicines that you will need to take regularly for HIV.
Take one tablet each day.
Swallow the tablet with a drink of water after a meal.
Clinical Author's Note (Michael Stewart) 18/07/2018: new data shows that women who are pregnant and are taking cobicistat in combination with darunavir (Rezolsta® or Symtuza®) have lower blood levels of the medicines compared to other patients. This means there may be a risk of the treatment not working properly and of HIV being passed on to the unborn child. Women who are pregnant or may become pregnant should not take cobicistat/darunavir combinations and should speak to their doctor about alternative treatments. For more information please refer to the MHRA advice for healthcare professionals.
Överblick
Cobicistat is a medicine for adults and children aged 12 or over with HIV infection.
It boosts the effectiveness of other HIV medicines like atazanavir or darunavir.
Take one tablet daily, after a meal, at the same time as atazanavir or darunavir.
Continue taking your medicine regularly to prevent HIV from becoming resistant.
Common side-effects include feeling sick and yellowing of skin or eyes.
If you have concerning side-effects or distressing thoughts, speak to your doctor.
About cobicistat
Typ av medicin | A pharmacokinetic enhancer |
Används för | Increasing the effect of atazanavir eller darunavir, which are medicines used for HIV infection. Cobicistat can be used in adults and in children aged 12 years or older. |
Även kallad | Tybost®; |
Tillgänglig som | Tabletter |
Cobicistat is prescribed for human immunodeficiency virus (HIV) infection. HIV destroys cells in the body, called CD4 T cells. These cells are a type of white blood cell and are important because they are involved in protecting your body from infection. If left untreated, the HIV infection weakens your immune system so that your body cannot defend itself against bacteria, viruses and other germs. You will be prescribed three or more antiretroviral medicines at the same time, as taking a combination of different medicines is more effective than taking one alone, and also it reduces the risk that the HIV virus will become resistant to any individual medicine. Antiretroviral medicines slow the progress of HIV infection, but do not cure it.
Cobicistat will be prescribed for you by a doctor who is a specialist. You will also have been prescribed either atazanavir or darunavir for the HIV infection. Cobicistat is given to boost the effect of these medicines. Atazanavir and darunavir are both protease inhibitor antiretroviral medicines. Cobicistat helps to improve the effectiveness of these medicines by slowing down their breakdown in the body. This increases the amount of time atazanavir or darunavir is present in your body.
Some brands of cobicistat contain other antiretroviral medicines also (see the list in the table above). Taking one of these brands helps to reduce the number of tablets you need to take each day. Not all of the information in this leaflet applies to the combination brands - please refer to the manufacturer's printed information leaflet from inside the pack for full details about these brands. You will also find more information about each of the individual medicines on our website (see atazanavir, darunavir, emtricitabine, tenofovir).
Before taking cobicistat
Some medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start taking cobicistat it is important that your doctor knows:
Om du är gravid, försöker bli gravid eller ammar.
If you have any problems with the way your liver works, or if you have problems with the way your kidneys work.
Om du någonsin har haft en allergisk reaktion mot en medicin.
Om du tar några andra läkemedel. Detta inkluderar alla läkemedel som kan köpas utan recept, samt växtbaserade och komplementära läkemedel.
How to take cobicistat tablets
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about cobicistat, and it will also provide you with a full list of the side-effects which you could experience from taking it.
Take cobicistat exactly as your doctor tells you to. Take one tablet a day, at the same time as either atazanavir or darunavir.
Swallow the tablet whole with a drink of water. Take the tablet after a meal or a snack.
If you forget to take a dose, take it as soon as you remember, providing it is within 12 hours of the time you should have taken it. Remember to take the tablet with something to eat. However, if when you remember, it is more than 12 hours late, do not take the dose you missed but instead take your next dose when it is due. Do inte take two doses together to make up for the forgotten dose.
Få ut det mesta av din behandling
Keep your regular appointments with your doctor so that your progress can be monitored. You are likely to need regular blood tests to check how well your medicines are working.
It is important that you continue to take your antiretroviral treatment regularly. This will help to prevent the HIV from becoming resistant to the medicines you are taking. Even if you miss only a small number of doses, the virus can become resistant to treatment.
If you develop an infection soon after you start the treatment, let your doctor know. As a result of taking antiretroviral medicines, your immune system may start fighting an infection which was present before you started the treatment, but which you may not have been aware of.
Although treatment with antiretroviral medicines may reduce the risk of you passing HIV to others through sexual contact, it does not stop it. It is important that you use condoms.
If you are trying for a baby or you become pregnant whilst taking cobicistat, let your doctor know straightaway. Your doctor may recommend a different treatment combination that could be more effective during pregnancy.
It is not uncommon for people with HIV to feel low or even depressed, especially soon after the diagnosis has been made and treatment has been started. If you have any feelings of depression, or any distressing thoughts about harming yourself then you should speak with your doctor omedelbart.
If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking cobicistat and antiretroviral medicines.
If you buy any medicines, supplements or herbal remedies 'over the counter', check with a pharmacist that they are suitable to take with cobicistat and your other medicines. This is because cobicistat can interfere with some medicines and stop them from working properly.
Can cobicistat tablets cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with cobicistat. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Very common cobicistat side-effects (these affect more than 1 in 10 people) | Vad kan jag göra om jag upplever detta? |
Känner dig illamående (nausea) | Stick to simple meals - avoid fatty or spicy food |
Yellowing of your skin or the whites of the eyes (jaundice) | Speak with your doctor as soon as possible |
Common cobicistat side-effects (these affect fewer than 1 in 10 people) | Vad kan jag göra om jag upplever detta? |
Huvudvärk | Drink plenty of water and ask a pharmacist to recommend a suitable painkiller. If the headaches continue, let your doctor know |
Feeling dizzy, tired or sleepy | Kör inte och använd inte verktyg eller maskiner när du är påverkad |
Being sick (vomiting), diarrhoea, stomach pain, indigestion, wind | Stick to simple meals - avoid fatty or spicy food |
Increased appetite, changes in the way things taste, dry mouth, rash, difficulty sleeping, abnormal dreams | Om något av dessa blir besvärligt, tala med din läkare |
Changes to some blood tests | Your doctor will check for these |
Om du upplever några andra symtom som du tror kan bero på medicinen, tala med din läkare eller apotekare för vidare råd.
How to store cobicistat
Förvara alla läkemedel utom räckhåll och synhåll för barn.
Store the tablets in the original container in a cool, dry place, away from direct heat and light.
Viktig information om alla läkemedel
Viktig information om alla läkemedel
Ta aldrig mer än den föreskrivna dosen. Om du misstänker att du eller någon annan kan ha tagit en överdos av denna medicin, gå till akutmottagningen på ditt lokala sjukhus. Ta med behållaren, även om den är tom.
Denna medicin är för dig. Ge den aldrig till andra människor även om deras tillstånd verkar vara detsamma som ditt.
Behåll inte föråldrade eller oönskade mediciner. Ta dem till ditt lokala apotek som kommer att ta hand om dem åt dig.
Om du har några frågor om denna medicin, fråga din apotekare.
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Vanliga frågor
What is the primary role of cobicistat in HIV treatment?
Cobicistat is a pharmacokinetic enhancer. It doesn't directly fight the HIV virus itself. Instead, it boosts the effect of other HIV medicines, specifically atazanavir or darunavir, by slowing down how quickly your body breaks them down. This means more of the atazanavir or darunavir stays in your system for longer, making them more effective in treating HIV.
Can children take cobicistat?
Yes, cobicistat can be used in children, but only those aged 12 years or older.
Why is cobicistat always prescribed with other HIV medicines?
Cobicistat is prescribed as part of a combination therapy for HIV. It is specifically designed to be taken with either atazanavir or darunavir to boost their effectiveness. Antiretroviral treatment for HIV typically involves three or more medicines because this approach is more effective and helps prevent the virus from becoming resistant to a single medicine.
Why might my doctor switch my HIV treatment if I become pregnant while taking cobicistat?
If you become pregnant while taking cobicistat, it's important to tell your doctor right away. Your doctor might recommend a different combination of treatments because some regimens may be more effective or safer during pregnancy for both you and your baby.
What should I do if I feel depressed or have self-harming thoughts while on cobicistat?
It's not uncommon for people with HIV to experience feelings of depression, especially after diagnosis or starting treatment. If you have any distressing thoughts about harming yourself, or if you feel low or depressed, you should speak with your doctor straightaway for support and advice.
Are there any specific foods I should avoid while taking cobicistat?
While taking cobicistat, if you experience side-effects like feeling sick (nausea), being sick (vomiting), diarrhoea, stomach pain, indigestion, or wind, it is recommended to stick to simple meals and avoid fatty or spicy foods to help manage these symptoms.
How should I store cobicistat tablets?
Cobicistat tablets should be stored in their original container in a cool, dry place, away from direct heat and light. Always keep all medicines out of the reach and sight of children.
Vidare läsning och referenser
- Manufacturer's PIL, Tybost® 150 mg film-coated tablets; Gilead Sciences Ltd, The electronic Medicines Compendium. Dated October 2021.
- Mediciner Komplett BNF 89:e Utgåvan; Brittiska Läkarföreningen och Kungliga Farmaceutiska Sällskapet i Storbritannien, London.
Om författarenVisa fullständig biografi

Michael Stewart, MRPharmS
Ansvarig för granskning av medicinbroschyrer – Konsult, Apotekare
BPharm (Hons), MRPharmS
Michael är en apotekare som arbetar i Midlands och South Yorkshire med mer än 20 års erfarenhet av att ge råd om läkemedel och medicinska tillstånd. Han har en stark bakgrund inom vårdutbildning och har producerat och levererat utbildningskurser för apoteksteam och personal inom vårdboenden, inklusive sjuksköterskor. Han har också bidragit till apoteksrådgivande styrelser för hantering av mindre allvarliga tillstånd i samhället.
Om recensenten

Sid Dajani
Sultan Dajani tog examen vid London School of Pharmacy 1994 och blev den yngsta valda medlemmen i Royal Pharmaceutical Society-rådet sedan dess grundande 1842.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Artikeln finns också på Engelska, Tyska, Spanska, Franska, Italienska, Portugisiska, Hindi, Hebreiska, Arabiska, och Svenska.
Next review due: 19 Jan 2027
20 Jul 2022 | Senaste versionen

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