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Mixed grasses, rye pollen extracts and extension course vaccine

Updated 2 Feb 2023 | Allergen Immunotherapy


Injections containing 13 selectively purified allergen extracts of pollen

Drugs List

  • Therapeutic Indications


    Seasonal allergic rhinitis - treatment when anti-allergy drugs ineffective


    It is recommended that the allergy vaccine should be given in each of three successive years.


    The vaccine is presented in vials. Each vial is pre-filled with vaccine in graded concentrations as follows:

    Vial/Syringe: No. 1 (Green); Recommended Dosage: 300 SU - 0.5 ml
    Vial/Syringe: No. 2 (Yellow); Recommended Dosage: 800 SU - 0.5 ml
    Vial/Syringe: No. 3 (Red); Recommended Dosage: 2000 SU - 0.5 ml

    The injections should be given at intervals of 7 to 14 days. i.e. treatment is to be initiated with 0.5 ml of vial No. 1, followed 7 to 14 days later by 0.5 ml of vial No. 2 and finally 7 to 14 days later 0.5 ml of vial No. 3, in accordance with the dosage regime above.

    The above dosage regimen is suitable for most patients in whom it is indicated. However, if the patient is particularly sensitive, then the dosage and the progression from dose to dose should be modified according to the clinician's discretion.

    The Extension Course consists of three injections of the maximum dose of 2000 SU/0.5 ml. (If the maximum dose is not tolerated, treatment can take place at a lower dose). The first injection should be given about 14 days after the last injection of the initial vaccine. Subsequent injections should then be given at intervals of 2 to 4 weeks. If the season is imminent, the interval can be reduced to 1 week.

    The maximum doses of 0.5 ml must not be exceeded.


    (See Dosage; Adult)


    Children 6 years and over:
    (See Dosage; Adult)


    Slowly by subcutaneous route only. Do not rub the site of injection.


    Administration site infection
    Autoimmune disease
    Children under 6 years
    Disturbance in tyrosine metabolism
    Febrile disorder
    Immunopathological disorder
    Inflammatory disorder
    Systemic infection
    Immunodeficiency syndromes
    Inflammation of the respiratory tract
    Ocular tuberculosis
    Pulmonary emphysema
    Pulmonary tuberculosis
    Severe psychiatric disorder

    Precautions and Warnings

    Cardiovascular disorder

    Advise patient drowsiness may affect ability to drive or operate machinery
    Do not use during grass pollen season
    Have available adrenaline injection 1:1000 for anaphylaxis
    Resuscitation facilities must be immediately available
    Observe patient for the first 60 minutes after each injection
    Discontinue treatment if skin rash or other allergic reaction occurs
    Do not exceed individual tolerated dose
    Advise patient not to eat heavy meal immediately before injection
    Advise patient not to take strenuous exercise for 12hrs following injection
    Advise patient to contact the doctor immediately in the event of a reaction

    The diagnosis should be based on the careful consideration of the patient's history and allergy tests, preferably skin tests.

    Patients should be kept under observation for the first 60 minutes after each injection. This period should be extended if even mild symptoms or signs of hypersensitivity develop and patients should be maintained under observation until these have completely resolved. A severe and prolonged adverse reaction may necessitate hospital admission.

    In the event of simultaneous vaccination against viral or bacterial pathogens, there should be an interval of at least one week between the last injection of the allergy vaccine and the day of vaccination provided all the side effects have completely disappeared. Hyposensitization therapy may be continued two weeks after the vaccination, providing all the side effects to the vaccination have completely disappeared using half of the last dose administered. Afterwards, this amount can be increased according to the dosage chart at intervals of 7 to 14 days.

    Pregnancy and Lactation


    Mixed grass pollen and rye vaccines are contraindicated in pregnancy.

    If the patient is pregnant or discover they have become pregnant whilst receiving treatment the vaccine should not be started or continued as pregnancy may change the patient's sensitisation level to a degree that cannot be foreseen.

    The use of all medication in pregnancy should be avoided whenever possible; particularly in the first trimester. Non-drug treatments should also be considered. When essential, a medication with the best safety record over time should be chosen, employing the lowest effective dose for the shortest possible time. Polypharmacy should be avoided. Teratogens taken in the pre-embryonic period, often quoted as lasting until 14 to 17 days post-conception, are believed to have an all-or-nothing effect. Where drugs have a short half-life, and when the date of conception is certain, this may allow women to be reassured where drug exposure has occurred within this time frame. Further advice may be available from the UK National Teratology Information Service (NTIS) and through ToxBase, available via password on the internet ( ) or if this is unavailable at the backup site ( ).


    Highly limited information on mixed grass pollen and rye vaccines during breastfeeding.

    Neonates, infants born prematurely, those with low birth weight, those with an unstable gastrointestinal function or who have serious illnesses may require special consideration. For any infant, if a drug is prescribed to the nursing mother, it should be at the lowest practical dose and for the shortest time. When drug administration is unavoidable and breastfeeding is to continue, minimisation of exposure of the infant to the drug may sometimes be achieved by timing the maternal doses to just after a feeding episode. Infants exposed to drugs via breast milk should be monitored for unusual signs or symptoms. Interactions between the drug received by the infant from the mother's milk and medication prescribed for the infant should also be considered, for example, when the drug given to the infant may prevent metabolism of the drug received via breast milk.
    Specialist advice is available from the UK Drugs in Lactation Advisory Service at

    Side Effects

    Allergic reaction
    Anaphylactic shock
    Exacerbation of pre-existing eczema
    Granuloma (injection site)
    Irritation (injection site)
    Local reaction at injection site
    Swelling (injection site)


    It is strongly recommended that the UK National Poisons Information Service be consulted on cases of suspected or actual overdose where there is doubt over the degree of risk or about appropriate management.

    The following number will direct the caller to the relevant local centre (0844) 892 0111

    Information may be obtained if you have access to ToxBase the primary clinical toxicology database of the National Poisons Information Service. This is available via password on the internet ( ) or if this is unavailable at the backup site ( ).

    Further Information

    Last Full Review Date: August 2013

    Reference Sources

    British National Formulary, 65th Edition (March - September 2013) Pharmaceutical Press, London.

    BNF for Children (2013-2014) Pharmaceutical Press, London.

    Summary of Product Characteristics: Pollinex Grasses + Rye. Allergy Therapeutics (UK) Ltd. Revised January 2006.

    Summary of Product Characteristics: Pollinex Grasses + Rye extension course. Allergy Therapeutics (UK) Ltd. Revised May 2006.

    The MATA (Modified Allergen Tyrosine Adsorbed) Range (e.g. POLLINEX Grasses +Rye/POLLINEX Trees) - Prescribing Information.
    Available at:
    Last accessed: 19 August 2013

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