Patient leaflet - Rezolsta 800 mg / 150 mg film-coated tablets
1What REZOLSTA is and what it is used for
What is REZOLSTA?
REZOLSTA contains the active substances
darunavir and cobicistat.
Darunavir belongs to a group of HIV
medicines called ‘protease inhibitors’ which
work by reducing the amount of HIV in your
body to a very low level. It is given with
cobicistat, which increases the amount of
darunavir in your blood.
Treatment with REZOLSTA will improve your
immune system (your body’s natural defences)
and reduce the risk of developing illnesses
linked to HIV infection, but REZOLSTA is not
a cure for HIV infection.
What it is used for?
REZOLSTA 800 mg/150 mg (darunavir/ cobicistat) is used to treat adults and paediatric patients who weigh at least 40 kilograms and who are infected by HIV (see How to take REZOLSTA in this leaflet).
REZOLSTA must be taken in combination with other HIV medicines. Your doctor will discuss with you which combination of medicines is best for you.
2What you need to know before you take REZOLSTA
Do not take REZOLSTA
if you are allergic to darunavir, cobicistat
or any of the other ingredients of this
medicine (listed in section 6).
if you have severe liver problems.
Ask your doctor if you are unsure about the
severity of your liver disease. Some
additional tests might be necessary.
Tell your doctor about all medicines you take including medicines taken orally, inhaled, injected or applied to the skin.
Do not combine REZOLSTA with any of the following medicines
If you are taking any of these, ask your doctor about switching to another medicine.
Medicine Purpose of the medicine
Alfuzosin to treat enlarged prostate
Amiodarone, bepridil, dronedarone,
ivabradine, quinidine, ranolazine
to treat certain heart disorders
e.g. abnormal heart beat
Carbamazepine, phenobarbital and
phenytoin
to prevent seizures
Astemizole or terfenadine to treat allergy symptoms
Colchicine (if you have kidney/liver
problems)
to treat gout or familial Mediterranean fever
The combination product lopinavir/ritonavir anti-HIV medicine
Rifampicin to treat some infections such as tuberculosis
Lurasidone, pimozide, quetiapine or sertindole to treat psychiatric conditions
Ergot alkaloids like ergotamine,
dihydroergotamine, ergometrine and
methylergonovine
to treat migraine headaches
Cisapride to treat some stomach conditions
St John’s Wort (Hypericum perforatum) a herbal product used for depression
Elbasvir/grazoprevir to treat hepatitis C infection
Lovastatin, simvastatin, and lomitapide to lower cholesterol levels
Triazolam or oral (taken by mouth)
midazolam
to help you sleep and/or relieve anxiety
Sildenafil to treat a heart and lung disorder called pulmonary arterial hypertension. There are other uses for sildenafil. Please see section ‘Other medicines and REZOLSTA’.
Avanafil to treat erectile dysfunction
Ticagrelor to help stop the clumping of platelets in the treatment of patients with a history of a heart attack
Naloxegol to treat opioid induced constipation
Dapoxetine to treat premature ejaculation
Domperidone to treat nausea and vomiting
Warnings and precautions
Talk to your doctor, pharmacist or nurse
before taking REZOLSTA.
People taking REZOLSTA may still develop
infections or other illnesses associated with
HIV infection. You must keep in regular
contact with your doctor.
People taking REZOLSTA may develop a skin
rash. Infrequently a rash may become severe
or potentially life-threatening. Please contact
your doctor whenever you develop a rash.
In patients taking REZOLSTA and raltegravir
(for HIV infection), rashes (generally mild or
moderate) may occur more frequently than in
patients taking either medicine separately.
REZOLSTA has only been used in limited
numbers of patients 65 years or older. If you
belong to this age group, please discuss with
your doctor if you can use REZOLSTA.
Make sure that you check the following
points and tell your doctor if any of these
apply to you.
Tell your doctor if you have had problems
with your liver before, including
hepatitis B or C infection. Your doctor may
evaluate how severe your liver disease is
before deciding if you can take REZOLSTA.
Tell your doctor if you have had problems
with your kidneys. Your doctor will
carefully consider whether to treat you with
REZOLSTA.
Tell your doctor if you have diabetes.
REZOLSTA might increase sugar levels
in the blood.
Tell your doctor immediately if you notice
any symptoms of infection (for example
enlarged lymph nodes and fever). In some
patients with advanced HIV infection and
a history of unusual infections due to
a weakened immune system (opportunistic
infection), signs and symptoms of
inflammation from previous infections may
occur soon after HIV treatment is started.
It is believed that these symptoms are due
to an improvement in the body’s immune
response, enabling the body to fight
infections that may have been present with
no obvious symptoms.
In addition to the opportunistic infections,
autoimmune disorders (a condition that
occurs when the immune system attacks
healthy body tissue) may also occur after
you start taking medicines for the treatment
of your HIV infection. Autoimmune disorders
may occur many months after the start
of treatment. If you notice any symptoms
of infection or other symptoms such as
muscle weakness, weakness beginning in
the hands and feet and moving up towards
the trunk of the body, palpitations, tremor
or hyperactivity, please inform your doctor
immediately so you can be given the
necessary treatment.
Tell your doctor if you have haemophilia.
REZOLSTA might increase the risk of
bleeding.
Tell your doctor if you are allergic to
sulphonamides (e.g. used to treat certain
infections).
Tell your doctor if you notice any
musculoskeletal problems. Some patients
taking combination antiretroviral therapy may
develop a bone disease called osteonecrosis
(death of bone tissue caused by loss of
blood supply to the bone). This may be
more likely with long-term HIV treatment,
more severe damage to the immune
system, overweight, or the use of alcohol
or other medicines called corticosteroids.
Signs of osteonecrosis are joint stiffness,
aches and pains (especially of the hip,
knee and shoulder) and difficulty in
movement. If you notice any of these
symptoms please inform your doctor.
Children and adolescents
REZOLSTA 800 mg/150 mg (darunavir/ cobicistat) is not for use in children weighing less than 40 kilograms.
REZOLSTA is also available as
a 675 mg/150 mg scored tablet for children
6 years and older weighing at least 25 kg
and less than 40 kg (see separate Package
Leaflet for REZOLSTA 675 mg/150 mg
film-coated tablets).
Other medicines and REZOLSTA
Tell your doctor or pharmacist if you are
taking or have recently taken any other
medicines.
There are some medicines that you must not combine with REZOLSTA. These are mentioned above under the heading ‘Do not combine REZOLSTA with any of the following medicines:’
REZOLSTA must not be used with another antiviral medicine that contains a booster or another antiviral that requires boosting. In some cases dosage of other medicines might need to be changed. Therefore, always tell your doctor if you take other anti-HIV medicines and follow your doctor’s instruction carefully on which medicines can be combined.
The effects of REZOLSTA might be reduced if you take any of the following products. Tell your doctor if you take:
- Bosentan (to treat heart disease)
Dexamethasone (injectable)
(corticosteroid)
- Efavirenz, etravirine, nevirapine (to treat HIV infection)
- Rifapentine, rifabutin (to treat bacterial infections).
The effects of other medicines might be influenced if you take REZOLSTA and your doctor might want to do some additional blood tests. Tell your doctor if you take:
- Amlodipine, carvedilol, diltiazem, disopyramide, felodipine, flecainide, lidocaine, metoprolol, mexiletine, nicardipine, nifedipine, propafenone, timolol, verapamil (for heart disease) as the therapeutic effect or side effects of these medicines may be increased.
- Apixaban, dabigatran etexilate, edoxaban, rivaroxaban, warfarin, clopidogrel (to reduce clotting of the blood) as their therapeutic effect or side effects may be altered.
- Clonazepam (to prevent seizures).
- Oestrogen-based hormonal contraceptives and hormone replacement therapy. REZOLSTA might reduce its effectiveness. When used for birth control, alternative methods of non-hormonal contraception are recommended.
- Ethinylestradiol/drospirenone. REZOLSTA might increase the risk for elevated potassium levels by drospirenone.
- Atorvastatin, fluvastatin, pitavastatin, pravastatin, rosuvastatin (to lower cholesterol levels). The risk of muscle damage might be increased. Your doctor will evaluate which cholesterol lowering regimen is best for your specific situation.
- Ciclosporin, everolimus, tacrolimus, sirolimus (for dampening down your immune system) as the therapeutic effect or side effects of these medicines might be increased.
- Corticosteroids including betamethasone, budesonide, fluticasone, mometasone, prednisone, triamcinolone. These medicines are used to treat allergies, asthma, inflammatory bowel diseases, inflammatory conditions of the skin, eyes, joints and muscles and other inflammatory conditions. These medicines are generally taken orally, inhaled, injected or applied to the skin. If alternatives cannot be used, its use should only take place after medical evaluation and under close monitoring by your doctor for corticosteroid side effects.
- Buprenorphine/naloxone, methadone (medicines to treat opioid dependence)
- Salmeterol (medicine to treat asthma)
- Artemether/lumefantrine (a combination medicine to treat malaria)
- Dasatinib, irinotecan, nilotinib, vinblastine, vincristine (medicines to treat cancer)
- Perphenazine, risperidone, thioridazine (psychiatric medicines)
- Clorazepate, diazepam, estazolam, flurazepam (medicines to treat sleeping disorders or anxiety)
- Sildenafil, tadalafil, vardenafil (for erectile dysfunction or to treat a heart and lung disorder called pulmonary arterial hypertension)
- Glecaprevir/pibrentasvir (to treat hepatitis C infection)
- Fesoterodine, solifenacin (to treat urologic disorders).
Your doctor might want to do some additional blood tests and the dosage of other medicines might need to be changed since either their own or REZOLSTA’s therapeutic effect or side effects may be influenced when combined.
Tell your doctor if you take:
- Dabigatran etexilate, edoxaban, warfarin (to reduce clotting of the blood)
- Alfentanil (injectable, strong and short-acting, painkiller that is used for surgical procedures)
- Digoxin (to treat certain heart disorders)
- Clarithromycin (antibiotic)
- Clotrimazole, fluconazole, itraconazole, isavuconazole, posaconazole (against fungal infections). Voriconazole should only be taken after medical evaluation.
- Rifabutin (against bacterial infections)
- Tadalafil, sildenafil, vardenafil (for erectile dysfunction or high blood pressure in the pulmonary circulation)
- Amitriptyline, desipramine, imipramine, nortriptyline, paroxetine, sertraline, trazodone (to treat depression and anxiety)
- Maraviroc (to treat HIV infection)
- Colchicine (to treat gout or familial Mediterranean fever). If you have renal and/or hepatic impairment see section ‘Do not combine REZOLSTA with any of the following medicines’.
- Bosentan (to treat high blood pressure in the pulmonary circulation)
- Buspirone, clorazepate, diazepam, estazolam, flurazepam, zolpidem, midazolam when used as injection (medicines to treat trouble with sleeping and/or anxiety)
- Metformin (to treat type 2 diabetes)
Fentanyl, oxycodone, tramadol
(to treat pain).
This is not a complete list of medicines. Tell your healthcare provider about all medicines that you are taking.
Pregnancy and breast‑feeding
Tell your doctor immediately if you are pregnant or planning to become pregnant. Pregnant women should not take
REZOLSTA.
Because of the potential for side effects in breast-fed infants, women should not breast-feed if they are receiving REZOLSTA.
Breast-feeding is not recommended in women living with HIV because HIV infection can be passed on to the baby in breast milk. If you are breast-feeding, or thinking about breast-feeding, you should discuss it with your doctor as soon as possible.
Driving and using machines
Do not operate machines or drive if you feel dizzy after taking REZOLSTA.
REZOLSTA contains sodium
This medicine contains less than 1 mmol sodium (23 mg) per tablet, that is to say essentially ‘sodium-free’.
3How to take REZOLSTA
Always use this medicine exactly as your doctor, pharmacist or nurse has told you. Check with your doctor, pharmacist or nurse if you are not sure.
You must take REZOLSTA every day and always with food. REZOLSTA cannot work properly without food. You must eat a meal or a snack within 30 minutes prior to taking your REZOLSTA. The type of food is not important.
- Swallow the tablet whole with a drink such as water or milk. If you have difficulty swallowing REZOLSTA, tell your doctor. The tablet may be split using a tablet-cutter. After splitting the tablet, the entire dose (both halves) should then be taken right away with a drink such as water or milk.
- Take your other HIV medicines used in combination with REZOLSTA as recommended by your doctor.
Removing the child resistant cap
The plastic bottle comes with a child resistant cap and must be opened as follows:
- Push the plastic screw cap down while turning it counter clockwise.
- Remove the unscrewed cap.
If you take more REZOLSTA than you should
Contact your doctor, pharmacist or nurse immediately.
If you forget to take REZOLSTA
If you notice within 12 hours, you must take the tablet immediately. Always take with food. If you notice after 12 hours, then skip the intake and take the next doses as usual. Do not take a double dose to make up for a forgotten dose.
If you vomit after taking REZOLSTA
If you vomit within 4 hours of taking the medicine, another dose of REZOLSTA should be taken with food as soon as possible. If you vomit more than 4 hours after taking the medicine, then you do not need to take another dose of REZOLSTA until the next regularly scheduled time.
Contact your doctor if you are uncertain about what to do if you miss a dose or vomit.
Do not stop taking REZOLSTA without talking to your doctor first
After therapy has started, it must not be stopped without instruction of the doctor.
Anti-HIV medicines may make you feel better. Even when you feel better, do not stop taking REZOLSTA. Talk to your doctor first.
If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.
4Possible side effects
During HIV therapy there may be an increase in weight and in levels of blood lipids and glucose. This is partly linked to restored health and life style, and in the case of blood lipids sometimes to the HIV medicines themselves. Your doctor will test for these changes.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Tell your doctor if you develop any of the following side effects
Liver problems that may occasionally be severe have been reported. Your doctor should do blood tests before you start REZOLSTA. If you have chronic hepatitis B or C infection, your doctor should check your blood tests more often because you have an increased chance of developing liver problems. Talk to your doctor about the signs and symptoms of liver problems. These may include yellowing of your skin or whites of your eyes, dark (tea coloured) urine, pale coloured stools (bowel movements), nausea, vomiting, loss of appetite, or pain, aching, or pain and discomfort on your right side below your ribs.
A common side effect of REZOLSTA is skin rash (more often when used in combination with raltegravir), itching. The rash is usually mild to moderate. A skin rash might also be a symptom of a rare severe situation. It is, therefore, important to talk to your doctor if you develop a rash. Your doctor will advise you how to deal with your symptoms or whether REZOLSTA must be stopped.
Other severe side effects, seen up to 1 patient in 10, were diabetes. Inflammation of the pancreas (pancreatitis) has been reported in up to 1 patient in 100.
Very common side effects (may affect more than 1 in 10 people)
- headache
- diarrhoea, nausea.
Common side effects (may affect up to 1 in 10 people)
- allergic reactions such as itching
- decreased appetite
- abnormal dreams
- vomiting, pain or swelling of the belly, indigestion, flatulence
- muscle pain
- tiredness
- abnormal blood test results such as some tests for your liver or kidney. Your doctor will explain these to you.
weakness.
Uncommon side effects (may affect up to 1 in 100 people)
- symptoms of infection or of autoimmune disorders (immune reconstitution inflammatory syndrome)
- osteonecrosis (death of bone tissue caused by loss of blood supply to the bone)
- enlargement of breasts
- abnormal blood test results such as some tests for your pancreas, high level of sugar, abnormal levels of ‘lipids’ (fats). Your doctor will explain these to you.
- allergic reactions such as nettle rash (urticaria), severe swelling of the skin and other tissues (most often the lips or the eyes)
- severe rash with blisters and peeling skin, particularly around the mouth, nose, eyes and genitals.
Rare side effects (may affect up to 1 in 1,000 people)
- a reaction called DRESS [severe rash, which may be accompanied by fever, fatigue, swelling of the face or lymph glands, increase of eosinophils (type of white blood cells), effects on liver, kidney or lung].
- darunavir crystals in the kidney causing kidney disease.
Side effects with unknown frequency: a rash may become severe or potentially life-threatening:
- rash with blisters and peeling skin over much of the body
- red rash covered with small pus-filled bumps that can spread over the body, sometimes with a fever.
Some side effects are typical for HIV medicines in the same family as REZOLSTA. These are:
- muscle pain, tenderness or weakness. On rare occasions, these muscle disorders have been serious.
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet.
You can also report side effects directly via the Yellow Card Scheme at:
https://yellowcard.mhra.gov.uk/ or search for MHRA Yellow Card in the Google Play or Apple App Store.
By reporting side effects you can help provide more information on the safety of this medicine.
5How to store REZOLSTA
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton and on the bottle after EXP. The expiry date refers to the last day of that month.
Do not use this medicine after 6 weeks of first opening the bottle.
REZOLSTA does not require any special storage conditions.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away any medicines you no longer use. These measures will help protect the environment.
6Contents of the pack and other information
What REZOLSTA contains
- The active substances are darunavir and cobicistat. Each tablet contains 800 mg of darunavir (as ethanolate) and 150 mg cobicistat.
- The other ingredients are hypromellose, silicified microcrystalline cellulose, colloidal silicon dioxide, crospovidone and magnesium stearate. The film-coating contains polyvinyl alcohol - partially hydrolysed, titanium dioxide (E 171), polyethylene glycol (macrogol), talc, iron oxide red (E 172), and iron oxide black (E 172).
What REZOLSTA looks like and contents of the pack
Film-coated, pink, oval-shaped tablet, mentioning TG on one side, 800 on the other side.
30 tablets in a plastic bottle.
Marketing Authorisation Holder
Janssen-Cilag Ltd., 50-100 Holmers Farm Way, High Wycombe, Buckinghamshire, HP12 4EG, UK
Manufacturer
Janssen-Cilag SpA, Via C. Janssen, Borgo San Michele, 04100 Latina, Italy
For information in large print, tape, CD or Braille, telephone 0800 7318450 This leaflet was last revised in May 2025. 2What you need to know before you take REZOLSTA (continued)
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