CONTACT US

Have questions? We’re here to help

We’re eager to hear from you. After all, listening is an incredibly important part of our human health care mission. Here are several ways to get in touch:

  • CLINICAL TRIALS

    Learn more about Eisai clinical trials to evaluate potential new therapies for neurological disorders and for various types of cancer.

  • EISAI USA FOUNDATION

    To submit an official request or if you have any further questions regarding the submissions process, please email EisaiUSAFoundation@eisai.com

  • Neurology

    For Neurology information or to report an adverse event, please:

    Call: 888-274-2378 (8:30 a.m. - 5:00 p.m. Eastern Time, Monday – Friday)

    Email: esi_medinfo@eisai.com

    Or write to: Medical Information, Eisai Inc., 100 Tice Blvd., Woodcliff Lake, NJ 07677, United States

  • Oncology

    For Oncology information or to report an adverse event, please:

    Call: 888-274-2378 (8:30 a.m. - 5:00 p.m. Eastern Time, Monday – Friday)

    Email: esi_oncmedinfo@eisai.com

    Or write to: Medical Information, Eisai Inc., 155 Tice Blvd., Woodcliff Lake, NJ 07677, United States

  • Reimbursement

    Curious about our product reimbursement and patient assistance programs (where applicable)?

    Please visit our Reimbursement Resources page. Or call us at your product’s phone number, below:

EISAI INC. (HEADQUARTERS)

100 Tice Blvd. Woodcliff Lake, NJ 07677 United States

Phone: 201.692.1100

Fax: 201.692.1804

41.041896 -74.076916

Eisai Center for Genetics Guided Dementia Discovery (G2D2)

35 Cambridgepark Drive Cambridge, MA 02140 United States

Phone: 857-829-6100

42.3948758 -71.1456942

Eisai Global Headquarters

Eisai Co., Ltd. 4-6-10 Koishikawa, Bunkyo-ku Tokyo 112-8088 Japan

Phone: +81-3-3817-3700

35.7151269 139.7397721

Eisai Inc. (Global Logistics)

4130 Parklake Avenue, Suite 500 Raleigh, NC 27612 United States

Phone: 919-941-6920

Fax: 919-941-6931

35.8352738 -78.6905248

Eisai Inc. (Manufacturing)

6611 Tributary St., #1 Baltimore, MD 21224 United States

Phone: 410-631-6300

39.267700 -76.531130

Epochal Precision Anti-Cancer Therapeutics (EPAT)

210 Welsh Pool Road Exton, PA 19341 United States

Phone: 610-423-6100

Fax: 610-423-6199

40.061700 -75.647460

EXTON

210 Welsh Pool Road Exton, PA 19341 United States

Phone: 610-423-6100

Fax: 610-423-6199

40.061700 -75.647460

H3 Biomedicine

300 Technology Square FL 5 Cambridge, MA 02139 United States

Phone: 617-252-5000

Media inquiries: media@h3biomedicine.com

42.366829 -71.074898

Eisai Center for Genetics Guided Dementia Discovery (G2D2)

35 Cambridgepark Drive

Cambridge, MA 02140

United States

Phone: 857-829-6100

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Eisai Global Headquarters

Eisai Co., Ltd.

4-6-10 Koishikawa, Bunkyo-ku

Tokyo 112-8088 Japan

Phone: +81-3-3817-3700

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Eisai Inc. (Global Logistics)

4130 Parklake Avenue, Suite 500

Raleigh, NC 27612

United States

Phone: 919-941-6920 | Fax: 919-941-6931

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EISAI INC. (HEADQUARTERS)

100 Tice Blvd.

Woodcliff Lake, NJ 07677

United States

Phone: 201-692-1100 | Fax: 201-692-1804

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Eisai Inc. (Manufacturing)

6611 Tributary St., #1

Baltimore, MD 21224

United States

Phone: 410-631-6300

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Epochal Precision Anti-Cancer Therapeutics (EPAT)

210 Welsh Pool Road

Exton, PA 19341

United States

Phone: 610-423-6100 | Fax: 610-423-6199

Open in Google Maps

Exton

210 Welsh Pool Road

Exton, PA 19341

United States

Phone: 610-423-6100 | Fax: 610-423-6199

Open in Google Maps

H3 BIOMEDICINE (H3)

300 Technology Square, FL 5

Cambridge, MA 02139

United States

Phone: 617-252-5000

Media inquiries: media@h3biomedicine.com

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