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

  • Neurology

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

    Call: 888-274-2378888-274-2378 (8:30 a.m. - 5:00 p.m. Eastern Time, Monday – Friday)

    Email:

    Or write to: Medical Information, Eisai Inc., 200 Metro Blvd., Nutley, NJ 07110, United States

  • Oncology

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

    Call: 888-274-2378888-274-2378 (8:30 a.m. - 5:00 p.m. Eastern Time, Monday – Friday)

    Email:

    Or write to: Medical Information, Eisai Inc., 200 Metro Blvd., Nutley, NJ 07110 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:

    • ACIPHEX® (rabeprazole sodium) delayed release tablets: 1-800-769-38801-800-769-3880

    • ARICEPT® (donepezil hydrochloride) tablets: 1-800-769-38801-800-769-3880

    • BANZEL® (rufinamide): 1-855-347-24481-855-347-2448

    • HALAVEN® (eribulin mesylate) Injection: 1-866-61-EISAI (1-866-613-47241-866-613-4724 )

    • LENVIMA® (lenvatinib) capsules: 1-866-61-EISAI (1-866-613-47241-866-613-4724)

EISAI INC. (HEADQUARTERS)

200 Metro Blvd, Nutley, NJ 07110 United States

Phone: 201-692-1100

Fax: 201.746.2600

40.834314 -74.156608

35 Cambridgepark Drive Cambridge, MA 02140 United States

Phone: 857-829-6100

42.3948758 -71.1456942

210 Welsh Pool Road Exton, PA 19341 United States

Phone: 610-423-6100

Fax: 610-423-6199

40.061700 -75.647460

210 Welsh Pool Road Exton, PA 19341 United States

Phone: 610-423-6100

Fax: 610-423-6199

40.061700 -75.647460

11675 Crossroads Circle Baltimore, MD 21220

Phone: 410-631-6300

39.35368 -76.40143

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

Phone: 919-941-6920

Fax: 919-941-6931

35.8352738 -78.6905248

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

Phone: +81-3-3817-3700

35.7151269 139.7397721

EISAI INC. (HEADQUARTERS)

200 Metro Blvd

Nutley, NJ 07110

United States

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

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Eisai Center for Genetics Guided Dementia Discovery (G2D2)

35 Cambridgepark Drive

Cambridge, MA 02140

United States

Phone: 857-829-6100

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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

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Exton

210 Welsh Pool Road

Exton, PA 19341

United States

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

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Eisai Inc. (Manufacturing)

11675 Crossroads Circle Baltimore, MD 21220

Phone: 410-631-6300

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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 Global Headquarters

Eisai Co., Ltd.

4-6-10 Koishikawa, Bunkyo-ku

Tokyo 112-8088 Japan

Phone: +81-3-3817-3700

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