Contact Our Teams 

Please visit our Patient Support page if you are a patient or caregiver looking for more information about Horizon's patient support program, Horizon By Your Side. This program is available for eligible U.S residents only.

In the U.S., to request medical information, please call 1-866-479-6742 (Option 1). If you are a U.S. health care professional looking for medical information, please visit our Medical Resources page.

 If you are located outside the U.S., please use the relevant contact information below:

In the U.S., to report an adverse event/side effect or quality complaint related to any Horizon medicine, please call 1-866-479-6742 (Option 1).

In Canada, to report an adverse event/side effect or quality complaint related to any Horizon medicine, please call TranscendRare™ at 1-844-380-7850 (Monday to Friday 8 a.m. – 8 p.m. EST) or call 1-866-479-6742 (Option 1).

If you are located outside the U.S. or Canada, to report an adverse event/side effect or quality complaint related to any Horizon medicine, please use the relevant contact information below:

Amgen recently acquired Horizon Therapeutics. For more information about clinical trials involving Horizon medicines and experimental treatments, click here.

For questions about Horizon clinical trials call 1-866-479-6742 or email clinicaltrials@horizontherapeutics.com.

To find more information about our Named Patient Use Programs, please visit the following pages:

See Amgen business development contact information on amgenbd.com.

See Amgen investor contact information on investors.amgen.com.

Questions regarding the medical education grant submission process can be sent to medicaleducation@horizontherapeutics.com, and questions regarding the external research grant submission process can be sent to externalresearch@horizontherapeutics.com.

See Amgen media contact information on amgen.com.

Offices Around the Globe

Japan

Tokyo

W22F Shibuya Mark City
1-12-1 Dogenzaka
Shibuya-ku, Tokyo
150-0043 Japan
Office 141-142

Get directions


Germany

Mannheim

Ireland

Dublin — Global HQ

Dublin — Global Headquarters

70 St. Stephen’s Green
Saint Kevin's, Dublin 2
D02E2X4
Ireland

Get directions


Waterford

IDA Business & Technology Park, Butlerstown
Waterford X91 PPN4
Ireland

Get directions


Italy

Milan

Via Tiziano 32
3rd floor, Office 320
Milan, Italy 20145

Get directions


Switzerland

Zug

Baarerstrasse 14-16
2nd floor, Office 215 & 216
Zug, Switzerland 6300

Get directions


Canada

Ontario

Vaughan

United States

California

South San Francisco

Two Tower Place
12th Floor
South San Francisco, CA 94080
United States

Get directions



District of Columbia

Washington, D.C. 

505 9th Street NW
Suite 600
Washington, D.C. 20004
United States

Get directions


Illinois

Deerfield — U.S. HQ

Deerfield — U.S. Headquarters

1 Horizon Way
Deerfield, IL 60015
United States

Get directions


Chicago

10 South Wacker Drive
Suite 2550
Chicago, IL 60606
United States

Get directions


Maryland

Rockville

2400 Research Blvd
Rockville, MD 20850
United States

Get directions


Brazil

Sao Paulo

Av. Dra. Ruth Cardoso
12th floor
8501 - Pinheiros
Office 1713, 1715 & 1730
Sao Paulo - SP, 05425-070

Get directions


Call or Email Us

In the United States, if this is a medical emergency, please call 911 or visit your nearest emergency room center.

For any other inquiries, please call
1-866-479-6742 (Option 2).