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What is CroFab^®

CroFab^® is the only antivenom derived exclusively from US snakes to treat all North American pit viper envenomations in adult and pediatric patients.^1,2 98% of venomous snakebites in the United States are from the North American pit viper.³

Approved in 2000, CroFab^® was designed to reduce the high incidence of hypersensitivity that occurred with previous antivenom therapy, and to provide a geographically relevant antivenom. In the years since, CroFab^® has become the antivenom that healthcare professionals rely on for the treatment of North American pit viper envenomation.^1,4

Treat With Confidence

Derived exclusively from native US snakes for comprehensive coverage of all US pit viper venoms¹
A safety profile you can count on¹
Included in unified consensus algorithm⁴

Hear why Dr. Thomas Arnold and Dr. William Banner choose CroFab®.

Regardless of Snakebite Severity, Treat With CroFab^®to*:

Halt local effects, such as edema and ecchymosis, and treat the source of the pain¹
Resolve systemic effects, such as nausea, vomiting, dizziness, or tachycardia¹
Reduce coagulation abnormalities, such as thrombocytopenia, hyperfibrinogenemia, and spontaneous bleeding^1,5

*Efficacy determined using the snakebite severity score (SSS), a validated objective tool for the clinical evaluation of North American pit viper snakebite in adults. The total score reflects patient evaluation on 6 dimensions: cardiovascular system, local wound, gastrointestinal system, hematologic symptoms, pulmonary system, and central nervous system. The higher the total score, the more severe the snakebite.¹

Mechanism of Action

For illustrative purposes only.

CroFab^® consists of venom-specific Fab fragments of immunoglobulin G (IgG) that work by binding to and neutralizing venom toxins, facilitating their redistribution away from target tissues and their elimination from the body.¹

How CroFab^® Works

Venom-specific Fab binds and neutralizes venom toxins¹
Facilitates venom toxin redistribution away from target tissues¹
Facilitates venom toxin elimination from the body¹

Understand how CroFab® is clinically proven to help halt envenomation.

View Efficacy >

References:

1. CroFab® [prescribing Information]. BTG International Inc; January 2018. 2. Data on file. Conshohocken, PA; BTG International Inc. 2019. 3. Gummin DD, Mowry JB, Spyker DA, Brooks DE, Fraser MO, Banner W. 2016 Annual Report of the American Association of Poison Control Centers’ National Poison Data System (NPDS): 34th Annual Report. Clin Toxicol. 2017;55(10):1072-1252. 4. Lavonas EJ, Ruha AM, Banner W, et al. Unified treatment algorithm for the management of crotaline snakebite in the United States: results of an evidence-informed consensus workshop. BMC Emerg Med. 2011;11:2.5. 5. Dart RC, McNally J. Efficacy, safety, and use of snake antivenoms in the United States. Ann Emerg Med. 2001;37(2):181-188.

Algorithm

Review the expert consensus for managing pit viper snakebites.

Dosing + Administration

Learn how to dose CroFab® to gain and continue control of pit viper envenomation.

Patient Experiences

Watch testimonials and review case studies to learn from patient experiences.

IMPORTANT SAFETY INFORMATION

CONTRAINDICATIONS

Do not administer CroFab® to patients with a known history of hypersensitivity to any of its components, or to papaya or papain unless the benefits outweigh the risks and appropriate management for anaphylactic reactions is readily available.

WARNINGS AND PRECAUTIONS

Coagulopathy: In clinical trials, recurrent coagulopathy (the return of a coagulation abnormality after it has been successfully treated with antivenin), characterized by decreased fibrinogen, decreased platelets, and elevated prothrombin time, occurred in approximately half of the patients studied; one patient required re-hospitalization and additional antivenin administration. Recurrent coagulopathy may persist for 1 to 2 weeks or more. Patients who experience coagulopathy due to snakebite should be monitored for recurrent coagulopathy for up to 1 week or longer. During this period, the physician should carefully assess the need for re-treatment with CroFab® and use of any type of anticoagulant or anti-platelet drug.

Hypersensitivity Reactions: Severe hypersensitivity reactions may occur with CroFab®. In case of acute hypersensitivity reactions, including anaphylaxis and anaphylactoid reactions, discontinue infusion and institute appropriate emergency treatment. Patients allergic to papain, chymopapain, other papaya extracts, or the pineapple enzyme bromelain may also have an allergic reaction to CroFab®. Follow-up all patients for signs and symptoms of delayed allergic reactions or serum sickness (e.g., rash, fever, myalgia, arthralgia).

ADVERSE REACTIONS

The most common adverse reactions (incidence ≥ 5% of subjects) reported in the clinical studies were urticaria, rash, nausea, pruritus and back pain. Adverse reactions involving the skin and appendages (primarily rash, urticaria, and pruritus) were reported in 12 of the 42 patients. Two patients had a severe allergic reaction (severe hives and a severe rash and pruritus) following treatment and one patient discontinued CroFab® due to an allergic reaction. Recurrent coagulopathy due to envenomation and requiring additional treatment may occur.

Please see full Prescribing Information.

INDICATION

CroFab® Crotalidae Polyvalent Immune Fab (Ovine) is a sheep-derived antivenin indicated for the management of adult and pediatric patients with North American crotalid envenomation. The term crotalid is used to describe the Crotalinae subfamily (formerly known as Crotalidae) of venomous snakes which includes rattlesnakes, copperheads and cottonmouths/water moccasins.

BTG and the BTG roundel logo are registered trademarks of BTG International Ltd.
CroFab ^® is a registered trademark of BTG International Inc.
TIME IS TISSUE^® is a trademark of Protherics Medicines Development Ltd., a BTG International group company. BTG Specialty Solutions Center^™ is a trademark of BTG International Ltd. SnakeBite911 and the snakehead logo are trademarks of Protherics UK Ltd. Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. ‭Google Play and the Google Play logo are trademarks of Google Inc.

© 2021 BTG International Inc. All rights reserved.
US-CRF-2100113 May 2021

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