Contact Us

Contact Sanofi UK

410 Thames Valley Park Drive

+44 (0) 845 023 0441   Fax: +44 (0) 800 471 8627

Contact Medical Information

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

  +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.

 To email Sanofi UK Medical Information, use the contact form below. This mailbox is not monitored outside of business hours or on public holidays.

Contact the UK Media Relations Team 

If you are a journalist with an enquiry, please contact the Sanofi UK Media Relations team at

+44 (0) 118 354 3554

or submit your question electronically via the contact form below. This route is intended for journalists with specific enquiries only. 

Report a Side Effect

You can tell us about any side effects you or your patient has experienced via the following channels:

Contact form below (please select ‘Side Effects’)

+44 (0) 800 0902314 (Monday - Friday) and Fax: +44 (0) 800 4716122 (information on reporting to the UK Health Authority)

Please note, 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.

What to include when you report a side effect

Reporter details your title and surname

Patient details initials, date of birth and gender of the patient

Event description of events and, if possible, start and resolution dates and outcome

Suspect medication name of the Sanofi medication taken and, if possible, dose, start date and action taken

Consent specify if you give permission to be contacted by us concerning your report

* Required fields
Contact details
Patient details
Message (both HCP and member of the public)
Additional fields IF MEMBER OF THE PUBLIC
Additional fields IF HCP

Privacy Notice

We will only use the information collected in this form for the purposes of handling and responding to your request. We will not send you unsolicited marketing materials. In the event that you are reporting a side effect, we may also use the information you submit to monitor the safety of our products and manage and report side effects.

Aventis Pharma Limited is the controller and responsible for any personal data you submit using this form. We will process your personal data on the basis that it is necessary for our legitimate interests (to maintain business contacts) and to comply with legal obligations and for reasons of public interest (monitoring side effects of products). Please see our Privacy Policy for more detailed information about our data processing activities.

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

Genzyme Limited
Registered in England and Wales
Company number: 01556886
Registered office address: 37 Hollands Road, Haverhill, Suffolk, CB9 8PV
Trading address: 12 Rookwood Way, Haverhill, Suffolk, CB9 8PU
VAT number: GB 246 0798 43