This website is intended for use by patients prescribed HYMPAVZI®▼ (marstacimab) in the UK, and has been developed and funded by Pfizer Ltd.
This information is not intended to be a substitute for advice provided by a healthcare professional. For advice, please consult a healthcare professional.
Adverse event reporting information can be found at the bottom of this page.
Patient Resources
HYMPAVZI Instructions for Use Video
Watch the HYMPAVZI Instructions for Use video, which includes instructions on injection sites, dosage, administration, storage and preparation steps.
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Learn more about Haemophilia Charities across the UK
The Haemophilia Society
Haemophilia Northern Ireland
Haemophilia Scotland
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in the package leaflet. You can also report side effects directly via the Yellow Card Scheme at https://yellowcard.mhra.gov.uk or search for MHRA Yellow Card in the Google Play or Apple App Store. Any suspected side effects may also be reported to Pfizer medical information on 01304 616161. By reporting side effects, you can help provide more information to the safety of this medicine.