COMIRNATY LP.8.1 30 micrograms/dose dispersion for injection in pre-filled syringe (ready for use)

Full name: COMIRNATY LP.8.1 30 micrograms/dose dispersion for injection in pre-filled syringe COVID-19 mRNA Vaccine.¹

Indication: indicated for active immunisation to prevent COVID-19 caused by SARS-CoV-2, in individuals 12 years of age and older.^†

The use of this vaccine should be in accordance with official recommendations.¹

^† This product is to be used in the National Immunisation Programme only for eligible individuals aged 12-17 years.²

How does the Pfizer/BioNTech Vaccine COMIRNATY LP.8.1 differ from Pfizer/BioNTech’s pre-existing COMIRNATY Vaccines?

COMIRNATY LP.8.1 30 micrograms/dose dispersion (ready for use) is a monovalent vaccine adapted to target the SARS-CoV-2 LP.8.1 Omicron subvariant.

Posology:
The dose of COMIRNATY LP.8.1 is 0.3mL given intramuscularly.

There should be an interval of at least 3 months between administration of COMIRNATY LP.8.1 and the last prior dose of a COVID-19 vaccine.

Please refer to 4.2 of the Summary of Product Characteristics for more information.

Administration: administered intramuscularly. The preferred site is the deltoid muscle of the upper arm. Do not dilute prior to use.

Pack size: 10 pre-filled Type 1 glass syringes.¹

Refrigerated storage (2°C to 8°C) once thawed:The vaccine will be received and stored at 2 °C to 8 °C . 12 month shelf life when stored at 2 °C to 8 °C. Store the vaccine in the original package in order to protect from light. ¹

Syringe: Single use pre-filled syringe.¹

Dose: 30 micrograms (0.3mL)¹

Room temperature stability before use:Prior to use, pre-filled syringes can be stored for up to 12 hours at temperatures between 8 °C to 30 °C and can be handled in room light conditions.¹

Click here for Summary of Product Characteristics

Verification, handling & preparation of COMIRNATY LP.8.1 30 micrograms/dose dispersion for injection in pre-filled syringe (ready for use)

Undesirable Effects:
The safety of COMIRNATY LP.8.1 is inferred from safety data of the prior COMIRNATY vaccines, given as first, second or subsequent doses.

The most common adverse reactions (classified as very common >1/10) from COMIRNATY clinical trials and post-authorisation experience in individuals 12 years of age and older were:

Diarrhoea
Headache
Arthralgia/Myalgia
Injection site pain/swelling/redness (redness only occured in immunocompromised participants <12 years)
Pyrexia*
Chills
Fatigue

Vomiting (only in pregnant women ages >18 years and immunocompromised participants from 12 to 18 years)

* a higher frequency of pyrexia was observed after a second dose compared to a first dose

Hypersensitivity and anaphylaxis:

Events of anaphylaxis have been reported. Appropriate medical treatment and supervision should always be readily available in case of an anaphylactic reaction following the administration of the vaccine.
Close observation for at least 15 minutes is recommended following vaccination. No further dose of the vaccine should be given to those who have experienced anaphylaxis after a prior dose of COMIRNATY.

Myocarditis and pericarditis:

There is an increased risk of myocarditis and pericarditis following vaccination with COMIRNATY. These conditions can develop within a few days after vaccination and have primarily occured within 14 days. They have been observed more often after the second vaccination and more often in younger males. Available data indicate that most cases recover. Some cases required intensive care support and fatal cases have been observed.
Healthcare professionals should be alert to the signs and symptoms of myocarditis and pericarditis. Vaccinees (including parents or caregivers) should be instructed to seek immediate medical attention if they develop symptoms indicative of myocarditis or pericarditis such as (acute and persisting) chest pain, shortness of breath, or palpitations following vaccination.
Healthcare professionals should consult guidance and/or specialists to diagnose and treat the conditions.

Before administering the vaccine, refer to the Summary of Product Characteristics for further details.

Adverse Event Reporting

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product.

Healthcare professionals are asked to report any suspected adverse reactions via a Yellow card. Reporting forms and information can be found at https://coronavirus-yellowcard.mhra.gov.uk/ or search for MHRA Yellow Card in the Google Play or Apple App Store and include the batch/Lot number if available.

Alternatively, adverse events of concern in association with COMIRNATY can be reported to Pfizer Medical Information on 01304 616161 or via www.pfizersafetyreporting.com.

Please do not report the same adverse event(s) to both systems as all reports will be shared between Pfizer and MHRA (in an anonymised form) and dual reporting will create unnecessary duplicates.

References:

COMIRNATY LP.8.1 30 micrograms/dose dispersion for injection in pre-filled syringe 12+ years COVID-19 mRNA Vaccine Summary of Product Characteristics. Available at: https://www.medicines.org.uk/emc/product/101150/smpc (accessed: March 2026)
Green Book on Immunisation COVID-19 chapter 14a. Available at: *Green book on Immunisation COVID-19 chapter 14a (accessed: March 2026)

PP-CMR-GBR-0991 March 2026

*Healthcare Professionals ** Other Relevant Decision Makers

The product information provided in this site is intended only for Healthcare Professionals and Other Relevant Decision Makers resident in United Kingdom.

This website is brought to you by Pfizer Limited, a company registered in England and Wales under No. 526209 with its registered office at Ramsgate Road, Sandwich, Kent CT13 9NJ, VAT registration number GB201048427.

The products discussed may have different product labelling in other countries.