Find similar products:
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 53095/0050.
ProQuad
ProQuad®
Powder and solvent for suspension for injection in a pre-filled syringe
Measles, mumps, rubella and varicella vaccine (live)
1. What ProQuad is and what it is used for
2. What you need to know before you receive ProQuad
3. How to use ProQuad
4. Possible side effects
5. How to store ProQuad
6. Contents of the pack and other information
ProQuad is a vaccine containing measles, mumps, rubella, and chickenpox (varicella) viruses that have been weakened. When a person is given the vaccine, the immune system (the body’s natural defences) will make antibodies against the measles, mumps, rubella, and varicella viruses. The antibodies help protect against diseases caused by these viruses.
ProQuad is given to help protect your child against measles, mumps, rubella, and chickenpox (varicella). The vaccine may be administered to persons from 12 months of age.
ProQuad may also be administered to infants from 9 months of age under special circumstances (to conform with national vaccination schedules, outbreak situations, or travel to a region with high prevalence of measles).
Although ProQuad contains live viruses, they are too weak to cause measles, mumps, rubella, or chickenpox (varicella) in healthy people.
If the person to be vaccinated has experienced any of the following, talk to the doctor or pharmacist before ProQuad is given:
If you have a blood clotting disorder or low levels of platelets in your blood, the injection will be given under the skin.
In rare circumstances, it is possible to catch chickenpox, including severe chickenpox, from a person who has been vaccinated with ProQuad. This may occur in persons who have not previously been vaccinated against chickenpox or had chickenpox, as well as persons who fall into one of the following categories:
Whenever possible, individuals who have been vaccinated with ProQuad should attempt to avoid close contact, for up to 6 weeks following the vaccination, with anyone who falls into one of the categories above. Tell your doctor if there is anyone who falls into one of the categories above and is expected to be in close contact with the person being vaccinated.
As with other vaccines, ProQuad may not completely protect all persons who are vaccinated. Also, if the person to be vaccinated has already been exposed to the measles, mumps, rubella, or varicella virus but is not yet ill, ProQuad may not be able to prevent the illness from appearing.
Tell your doctor or pharmacist if the person to be vaccinated is taking or has recently taken any other medicines (or other vaccines).
ProQuad can be given at the same time as other childhood vaccines such as Prevenar, and/or hepatitis A vaccine, or with vaccines containing diphtheria, tetanus, acellular pertussis, Haemophilus influenzae type b, inactivated poliomyelitis, or hepatitis B. A different place for the injection will be used for each vaccine.
The doctor may delay vaccination for at least 3 months following blood or plasma transfusions, or administration of immune globulin (Ig), or varicella-zoster immune globulin (VZIG). After vaccination with ProQuad, Ig or VZIG should not be given for 1 month, unless your doctor tells you otherwise.
If a tuberculin test is to be performed, it should be done either any time before, simultaneously with, or 4 to 6 weeks after vaccination with ProQuad.
Tell the doctor if the person to be vaccinated has recently received a vaccine or if one is scheduled to be given in the near future. The doctor will determine when ProQuad may be given.
The use of salicylates (for example, acetylsalicylic acid, a substance present in many medicines used to relieve pain and lower fever) should be avoided for 6 weeks following vaccination with ProQuad.
ProQuad should not be given to pregnant women. Women of child-bearing age should take the necessary precautions to avoid pregnancy for 1 month following vaccination.
Persons who are breast-feeding or who intend to breast-feed should tell the doctor. The doctor will decide if ProQuad should be given.
If you are pregnant or breast-feeding, think you may be pregnant, or are planning to have a baby, ask your doctor or pharmacist for advice before taking this vaccine.
This medicine contains less than 1 mmol sodium (23 mg) per dose, that is to say essentially ‘sodium-free’.
This medicine contains less than 1 mmol potassium (39 mg) per dose, that is to say essentially ‘potassium-free’.
This medicine contains 16 mg sorbitol per dose. The additive effect of concomitantly administered products containing sorbitol (or fructose) and dietary intake of sorbitol (or fructose) should be taken into account.
ProQuad should be injected into the muscle or under the skin either in the area of the outer thigh or of the upper arm.
Usually for injections into the muscle the thigh area is preferred in young children, whereas for older individuals the upper arm area is the preferred injection site.
If the person to be vaccinated has a blood clotting disorder or low levels of platelets, the vaccine should be given under the skin because bleeding may occur following administration into the muscle.
ProQuad is not to be injected directly into any blood vessel.
ProQuad is given by injection as follows:
The appropriate time and number of injections will be determined by your doctor in accordance with official recommendations.
Reconstitution instructions intended for medical and healthcare professionals are included at the end of the leaflet
Your doctor will decide when to give the missed dose.
Like all vaccines and medicines, this vaccine can cause side effects, although not everybody gets them.
Allergic reactions (hives) may occur. Some of these reactions may be serious and may include difficulty in breathing or swallowing. If the vaccinated person has an allergic reaction, call your doctor right away.
Other side effects have been reported following administration of ProQuad and some of these were serious. These included:
The following other side effects reported with the use of ProQuad were:
Other side effects have been reported with the use of at least one of the following: ProQuad, previous formulations of monovalent and of the combined measles, mumps, and rubella vaccines manufactured by Merck Sharp & Dohme LLC, Rahway, NJ 07065, USA (herein after MSD), or Varicella Vaccine live (Oka/Merck). These adverse events include:
The doctor has a more complete list of side effects for ProQuad and for the vaccine components for ProQuad (the measles, mumps, and rubella vaccine manufactured by MSD and Varicella Vaccine live (Oka/Merck)).
If the vaccinated person gets any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the 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.
Keep this vaccine out of the sight and reach of children.
Do not use this vaccine after the expiry date which is stated on the outer carton after EXP. The expiry dates refers to the last day of that month.
Store and transport refrigerated (2°C-8°C).
Do not freeze.
Keep the vial in the outer carton in order to protect from light.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
After reconstitution, one dose (0.5 mL) contains:
The active substances are:
Measles virus1 Enders’ Edmonston strain (live, attenuated) ........ not less than 3.00 log10 TCID50*
Mumps virus1 Jeryl Lynn™ (Level B) strain (live, attenuated) ... not less than 4.30 log10 TCID50*
Rubella virus2 Wistar RA 27/3 strain (live, attenuated) ............... not less than 3.00 log10 TCID50*
Varicella virus3 Oka/Merck strain (live, attenuated) .................... not less than 3.99 log10 PFU**
*50% tissue culture infectious dose
**plaque-forming units
(1) Produced in chick embryo cells.
(2) Produced in human diploid lung (WI-38) fibroblasts.
(3) Produced in human diploid cells (MRC-5).
The other ingredients are:
Powder
Sucrose, hydrolysed gelatin, urea, sodium chloride, sorbitol (E 420), monosodium glutamate, sodium phosphate, sodium bicarbonate, potassium phosphate, potassium chloride, medium 199 with Hanks’ Salts, MEM, neomycin, phenol red, hydrochloric acid and sodium hydroxide.
Solvent
Water for injections.
The vaccine is a powder for suspension for injection contained in a single-dose vial, which should be mixed with solvent provided with the vial of powder.
The powder is a white to pale yellow compact crystalline cake and the solvent is a clear colourless liquid.
ProQuad is available in pack of 1, 10 and 20. Not all pack sizes may be marketed.
Marketing Authorisation Holder:
Manufacturer Responsible for Batch Release:
For any information about this medicinal product, please contact the Marketing Authorisation Holder:
This leaflet was last revised in October 2025
© 2025 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.
IB-032