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The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on 0800 198 5000. The product code(s) for this leaflet is: PLGB 15036/0149.
Voncento 500 IU / 1200 IU and 1000 IU / 2400 IU powder and solvent for solution for injection/infusion
Voncento® 250 IU FVIII / 600 IU VWF (5 ml solvent) powder and solvent for solution for injection/infusion
Voncento® 500 IU FVIII / 1200 IU VWF(10 ml solvent) powder and solvent for solution for injection/infusion
Voncento® 500 IU FVIII/ 1200 IU VWF (5 ml solvent) powder and solvent for solution for injection/infusion
Voncento® 1000 IU FVIII / 2400 IU VWF (10 ml solvent) powder and solvent for solution for injection/infusion
human coagulation factor VIII
human von Willebrand factor
1. What Voncento is and what it is used for
2. What you need to know before you use Voncento
3. How to use Voncento
4. Possible side effects
5. How to store Voncento
6. Contents of the pack and other information
The product is made from human plasma (the liquid part of the blood) and contains the active substances called human coagulation factor VIII (FVIII) and human von Willebrand factor (VWF).
Voncento is used for all age groups to prevent or to halt bleeding caused by the lack of VWF in von Willebrand disease (VWD) and the lack of FVIII in haemophilia A. Voncento is only used when treatment with another medicine, desmopressin, is not effective alone or cannot be given.
VWF and FVIII are involved in blood clotting. Lack of either factor means that blood does not clot as quickly as it should so there is an increased tendency to bleed. The replacement of VWF and FVIII by Voncento will temporarily repair the blood clotting mechanisms.
As Voncento contains both FVIII and VWF, it is important to know which factor you most need. If you have haemophilia A your doctor will prescribe you Voncento with the number of units of FVIII specified. If you have VWD your doctor will prescribe you Voncento with the number of units of VWF specified.
Traceability
It is strongly recommended that every time Voncento is given, you record the date of administration, the batch number and the injected volume in your treatment diary.
Talk to your doctor, nurse or pharmacist before taking Voncento.
When medicines are made from human blood or plasma, certain measures are put in place by the manufacturer to prevent infections being passed on to patients. These include:
Despite these measures, when medicines prepared from human blood or plasma are administered, the possibility of passing on infection cannot be totally excluded. This also applies to any unknown or emerging viruses or other types of infections.
The measures taken are considered effective for so-called “enveloped” viruses such as human immunodeficiency virus (HIV, the AIDS virus), hepatitis B virus and hepatitis C virus (which cause inflammation of the liver), and for the “non-enveloped” hepatitis A virus (which also causes inflammation of the liver).
The measures taken may be of limited value against non-enveloped viruses such as parvovirus B19.
Parvovirus B19 infection may be serious
Your doctor may recommend that you consider being vaccinated against hepatitis A and B if you regularly/repeatedly receive human plasma-derived medicines such as Voncento.
The listed warnings and precautions apply to children and adolescents.
Voncento does not affect your ability to drive and use machines.
The presentation 500 IU FVIII /1200 IU VWF (5 ml solvent) contains up to 14.75 mg sodium per vial (main component of cooking/table salt). This is equivalent to 0.74 % of the recommended maximum daily dietary intake of sodium for an adult.
The presentation 1000 IU FVIII /2400 IU VWF (10 ml solvent) contains up to 29.50 mg sodium per vial (main component of cooking/table salt). This is equivalent to 1.48% of the recommended maximum daily dietary intake of sodium for an adult.
Your treatment should be monitored by a doctor who is experienced in the treatment of blood clotting disorders.
If your doctor thinks you could administer Voncento yourself, appropriate instructions will be provided to you by your doctor. Always take this medicine exactly as your doctor has told you. Check with your doctor if you are not sure.
The amount of VWF and FVIII you need to take and the duration of treatment depend on:
(see also section “The following information is intended for healthcare professionals only”).
If you have been prescribed Voncento to use at home, your doctor will make sure that you are shown how to inject it and how much to use.
Follow the directions given to you by your doctor.
Use in children and adolescents
Dosing in children and adolescents aged < 18 years is based on body weight and is therefore generally based on the same instructions as for adults. In some cases, especially in younger patients, higher doses may be needed.
If you use more Voncento than you should
Five cases of overdose have been reported from clinical trials. No side effects have been associated with these reports. The risk of developing blood clots (thrombosis) cannot be excluded in case of an extremely high dose, especially in patients with VWD.
If you forget to use Voncento
If you stop using Voncento
Do not stop using Voncento without consulting your doctor.
General Instructions
Reconstitution
Without opening the vials, warm the Voncento powder and the liquid to room or body temperature. This can be done either by leaving the vials at room temperature for about an hour, or by holding them in your hands for a few minutes.
DO NOT expose the vials to direct heat. The vials must not be heated above body temperature (37 ºC).
Carefully remove the protective caps from the vials, and clean the exposed rubber stoppers with an alcohol swab. Allow the vials to dry before opening the Mix2Vial package (which contains the filter transfer device), then follow the instructions given below.
1. Open the Mix2Vial package by peeling off the lid. Do not remove the Mix2Vial from the blister package!
2. Place the solvent vial on an even, clean surface and hold the vial tight. Take the Mix2Vial together with the blister package and push the spike of the blue adapter end straight down through the solvent vial stopper.
3. Carefully remove the blister package from the Mix2Vial set by holding at the rim, and pulling vertically upwards. Make sure that you only pull away the blister package and not the Mix2Vial set.
4. Place the product vial on an even and firm surface. Turn the solvent vial upside down with the Mix2Vial set attached and push the spike of the transparent adapter end straight down through the product vial stopper. The solvent will automatically flow into the product vial.
5. With one hand grasp the product-side of the Mix2Vial set. With the other hand grasp the solvent-side and unscrew the set carefully counterclockwise into two pieces to avoid excessive build-up of foam when dissolving the product. Discard the solvent vial with the blue Mix2Vial adapter attached.
6. Gently swirl the product vial with the transparent adapter attached until the substance is fully dissolved. Do not shake.
7. Draw air into an empty, sterile syringe. While the product vial is upright, connect the syringe to the Mix2Vial´s Luer Lock fitting by screwing clockwise. Inject air into the product vial.
Withdrawal and application
8. While keeping the syringe plunger pressed, turn the system upside down and draw the solution into the syringe by pulling the plunger back slowly.
9. Now that the solution has been transferred into the syringe, firmly hold on to the barrel of the syringe (keeping the syringe plunger facing down) and disconnect the transparent Mix2Vial adapter from the syringe by unscrewing counterclockwise.
Use the venipuncture kit supplied with the product, insert the needle into a vein. Let blood flow back to the end of the tube. Attach the syringe to the threaded, locking end of the venipuncture kit. The use of plastic disposable syringes is recommended as the ground glass surfaces of all-glass syringes tend to stick with solutions of this type. Inject/infuse the reconstituted solution slowly (at a rate not more than 6 ml per minute) into the vein following the instructions given to you by your doctor. Take care not to get any blood in the syringe containing the product.
In case large volumes of Voncento are required, it is possible to pool several vials of Voncento together via a commercially available infusion set (e.g. a syringe pump for giving medicines into a vein). However, in these cases the initially reconstituted solution of Voncento should not be diluted any further.
Check yourself for any side effects that might happen straight away. If you have any side effects that might be related to the administration of Voncento, the injection or infusion should be stopped (see also section 2).
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, Voncento can cause side effects, although not everybody gets them.
The following side effect has been observed very commonly (may affect more than 1 in 10 people):
The following side effects have been observed commonly (may affect up to 1 in 10 people):
The following side effects have been observed uncommonly (may affect up to 1 in 100 people):
Side effects in children and adolescents are expected to be the same as in adults.
If you get any side effects, talk to your doctor or healthcare professional. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the UK Yellow Card Scheme at www.mhra.gov.uk/yellowcard 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.
The active substance is:
250 IU FVIII and 600 IU VWF per vial; after reconstitution with 5 ml of water for injection approx. 50 IU/ml FVIII and 120 IU/ml VWF.
500 IU FVIII and 1200 IU VWF per vial; after reconstitution with 10 ml of water for injection approx. 50 IU/ml FVIII and 120 IU/ml VWF.
500 IU FVIII and 1200 IU VWF per vial; after reconstitution with 5 ml of water for injections approx. 100 IU/ml FVIII and 240 IU/ml VWF.
1000 IU FVIII and 2400 IU VWF per vial; after reconstitution with 10 ml of water for injections approx. 100 IU/ml FVIII and 240 IU/ml VWF.
See section “The following information is intended for healthcare professionals only” for further information.
The other ingredients are:
Calcium chloride, human albumin, sodium chloride, sodium citrate, sucrose, trometamol.
See section 2 “Voncento contains sodium”.
Solvent: Water for injections
Voncento is supplied as a white powder and solvent for solutionfor injection/infusion.
The reconstituted solution should be clear to slightly opalescent, i.e. it might sparkle when held up to the light but must not contain any obvious particles.
The immediate container of product and solvent vial consists of glass vial with a rubber stopper, plastic disc, and aluminium cap.
Presentations
One pack with 250 IU/600 IU or 500 IU/1200 IU containing:
One inner box containing:
1 disposable 10 ml syringe
1 venipuncture set
2 alcohol swabs
1 non-sterile plaster
One pack with 500 IU/1200 IU or 1000 IU/2400 IU containing:
One inner box containing:
1 disposable 10 ml syringe
1 venipuncture set
2 alcohol swabs
1 non-sterile plaster
Not all pack sizes may be marketed.
For any information about this medicine, please contact the local representative of the Marketing Authorisation Holder:
This leaflet was last revised in 04/2024.