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Scorpion (Centruroides) immune f(ab)2 (By injection)

Scorpion (Centruroides) Immune F(ab)2 (SKOR-pee-on SEN-troo-roy-deez i-MUNE fab-too)

Treats scorpion stings.

Brand Name(s):


There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You will be monitored carefully if you have had an allergic reaction to Scorpion (Centruroides) immune F(ab)2 or another product with horse protein. This medication will always be used if you or your child have been stung by a scorpion because it can be serious.

How to Use This Medicine:


  • Your doctor will prescribe your dose and schedule. This medicine is given through a needle placed in a vein.
  • A nurse or other health provider will give you this medicine.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Warnings While Using This Medicine:

  • Make sure your doctor knows if you are pregnant or breastfeeding, or if you have any other medical problems. Tell your doctor if you have an allergy to horse protein.
  • This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you or your child have a rash; itching; hoarseness; trouble breathing; trouble swallowing; or any swelling of your hands, face, or mouth while you are receiving this medicine.
  • Call your doctor or the emergency department right away if you or your child develop a delayed allergic reactions or serum sickness, which may occur for up to 14 days after receiving this medicine. These includes a rash, itching skin, fever, general feeling of discomfort or illness, joint or muscle pain, unusual tiredness or weakness, or swollen, painful, or tender lymph glands in the neck, armpit, or groin.
  • This medicine is made from horse blood. Some horse blood products have transmitted certain viruses to people who have received them. The risk of getting a virus from medicines made from horse blood has been greatly reduced in recent years. This is the result of required testing of horses for certain viruses, and testing during the making of these medicines. Although the risk is low, talk with your doctor if you have concerns.
  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Chest pain, shortness of breath, or troubled breathing.
  • Fast, pounding, or uneven heartbeat.
  • Fever or chills.
  • Joint or muscle pain.
  • Problems with balance or walking.
  • Swelling of the eyes.
  • Swollen, painful, or tender lymph glands in your neck, armpit, or groin.
  • Unusual tiredness or weakness.

If you notice these less serious side effects, talk with your doctor:

  • Headache.
  • Diarrhea, nausea, or vomiting.
  • Rash or itching skin.
  • Runny nose.
  • Unusual drowsiness.

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Last Updated: 5/1/2020

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