The Priorix Injections is a combination of Measles, Mumps, and Rubella vaccine that protects against three infectious diseases: measles, mumps, and rubella. It is given as a routine childhood vaccination in many countries. Measles is a highly contagious viral infection that can cause serious complications, including pneumonia, encephalitis (brain swelling), and even death. Mumps is a viral infection primarily affecting the salivary glands, causing swelling and pain in the jaw area. It can also lead to complications like meningitis (inflammation of the brain layer), deafness, and inflammation of the testicles or ovaries. Rubella is a viral infection that causes a rash and fever. While it is generally a mild illness, it can have severe consequences if contracted by pregnant women, as it can lead to congenital rubella syndrome in the unborn child.

The Priorix Injection is considered safe and well-tolerated. Like any vaccine, it can have mild side effects such as pain or swelling at the injection site, low-grade fever, or a rash. Serious side effects are rare. Vaccination against measles, mumps, and rubella is important for individual protection and for creating herd immunity (immunity in the population). Suppose an individual has had a severe allergic reaction (such as anaphylaxis) to a previous dose or any of its components. In that case, they should not receive further doses of the vaccine. People with severe immunodeficiency, such as certain types of cancer, HIV/AIDS with low CD4 counts (type of immune cell), or those receiving immunosuppressive treatments like chemotherapy or high-dose steroids, should not receive it. If an individual has received blood products or immunoglobulins (antibodies) within the past few months, the Priorix Injections may need to be delayed. Pregnant women should not take it.

• Prevention of Measles
• Prevention of Mumps
• Prevention of Rubella

The Priorix Injection is primarily used as a preventive measure to provide immunity against measles, mumps, and rubella infections. It is not typically used for therapeutic purposes. It stimulates the immune system to respond against the viruses that cause measles, mumps, and rubella. This response includes the production of specific antibodies that can recognize and neutralize these viruses, preventing or reducing the severity of the infections if an individual is exposed to them in the future.

Inform the doctor about your medicines, including prescription, over-the-counter, nutritional or vitamin supplements, and herbal products. Certain medications may interact with the Priorix Injections, reducing effectiveness by causing undesirable side effects.

• Store in a refrigerator at 2-15°C.
• Keep away from moisture, heat, and light.
• It should not be frozen.
• Keep away from children and pets.

Priorix Injections are typically administered by a healthcare professional. It is usually given as an injection. The healthcare provider will determine the dosage and duration of treatment based on the specific infection and individual factors.

Priorix Injections cause some side effects like all medications, although not everyone will experience them. 

Serious:

• Severe allergic reactions
• Seizures (associated with fever)
• Temporary low platelet count

Common:

• Soreness, redness, or swelling at the injection site
• Low-grade fever
• Rash or temporary mild rash
• Temporary pain or stiffness in the joints
• Mild swelling of the glands

Before receiving the Priorix Injections, inform your healthcare provider about any known allergies, previous adverse reactions, or a history of seizures or Guillain-Barré Syndrome (neurological disease). Individuals with severe immunodeficiency or those who have received blood transfusions or immune globulin within the past 11 months may require modified vaccination schedules. If a woman is planning to become pregnant, it is generally recommended to wait at least one month after receiving it before trying to conceive. The vaccine vial stoppers or syringe caps may contain natural rubber latex, which can cause an allergic reaction in individuals with latex allergies. If you or your child has a known latex allergy, it is important to inform your healthcare provider before receiving this injection. Discuss pre-existing medical conditions, recent treatments, and individual circumstances with your healthcare provider to determine the most appropriate approach to vaccinating against Measles, Mumps, and Rubella.

1. Merck, Sharp & Dohme Corp, U.S FDA (Food Drug and Safety Administration), [Last Revised March 2023], [Accessed on 29th May 2023], https://www.fda.gov/media/75191/download
2. Merck Sharp & Dohme (UK) Limited, Electronic medicine [Last Revised November 2022], [Accessed on 29th May 2023]https://www.medicines.org.uk/emc/files/pil.6307.pdf
3. The Merck Manual, "Vaccines and Immunization, 19th Edition, 2018, 1080-1081