Contact Us

Contact Sanofi UK

410 Thames Valley Park Drive

+44 (0) 1183 543 000   Fax: +44 (0) 800 471 8627

Contact Medical Information

For patients/carers or healthcare professionals with an enquiry related to Sanofi medicines.

Call +44 (0) 800 035 2525
(Monday – Friday, 8:30-17:30, excluding public holidays) An out of hours service on the same number is available for healthcare professionals needing urgent assistance. Calls may be recorded/monitored for training purposes.

Email your enquiry (click icon)
This mailbox is not monitored outside of business hours or on public holidays. 

Report a Side Effect

Please note that we cannot provide medical advice on your symptoms. If you are concerned about your personal health or condition(s), have a medical issue or symptoms, or they worsen, please contact your doctor or healthcare provider.

Call +44 (0) 800 0902314 
(Monday – Friday 9:00-17:00, excluding public holidays) 


Email us (click icon)
(This mailbox is not monitored outside of business hours or on public holidays)

Reporting to the UK Health Authority or via the Yellow Card app available from the Apple App Store or Google Play Store or by emailing

Contact the UK Media Relations Team 

Please note this route is intended for journalists with specific enquiries only.

Call +44 (0) 118 354 3554


Email your enquiry (click icon)

UK Operating Companies

Sanofi is made up of different legal entities and in the United Kingdom Sanofi conducts its business through the following companies:

Aventis Pharma Limited
Registered in England and Wales
Company number: 01535640
Registered office address: 410 Thames Valley Park Drive, Reading, Berkshire, RG6 1PT
VAT number: GB 246 0798 43

Registered in England and Wales
Company Number: 01556886
Registered office address: 37 Hollands Road, Haverhill, Suffolk. CB9 8PU
Trading address: 12 Rookwood Way, Haverhill, Suffolk. CB9 8PB.
VAT number: GB 373 514 203