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U.S. Department of Health and Human Services

Vaccines, Blood & Biologics

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Resources for You

Black Widow Spider Antivenin (Equine)

Proper Name: Antivenin (Latrodectus mactans) (Equine)
Tradename: Black Widow Spider Antivenin
Manufacturer: Merck & Co, Inc

  • To treat patients with symptoms due to bites by the black widow spider (Latrodectus mactans).

Contact FDA

(800) 835-4709
(240) 402-8010
Consumer Affairs Branch (CBER)

Division of Communication and Consumer Affairs

Office of Communication, Outreach and Development

Food and Drug Administration

10903 New Hampshire Avenue

Building 71 Room 3103

Silver Spring, MD 20993-0002