Skip to main content

Antivenin (micrurus fulvius) Side Effects

Medically reviewed by Last updated on Apr 22, 2022.

For the Consumer

Applies to antivenin (micrurus fulvius): intravenous powder for solution

Side effects requiring immediate medical attention

Along with its needed effects, antivenin (micrurus fulvius) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking antivenin (micrurus fulvius):

More common

  • Difficulty in breathing or swallowing
  • hives
  • itching, especially of feet or hands
  • reddening of skin, especially around ears
  • swelling of eyes, face, or inside nose
  • unusual tiredness or weakness

For up to 24 days after you have received North American coral snake antivenin, you may develop symptoms of a side effect called serum sickness. The severity of the symptoms and the length of the sickness depend on the amount of North American coral snake antivenin you were given and how long the treatment lasted. During this period of time check with your doctor if you notice any of the following side effects:

  • Fever
  • redness of joints
  • skin rash and itching
  • swollen glands

For Healthcare Professionals

Applies to antivenin (micrurus fulvius): intravenous kit


The most common adverse events were anaphylaxis, serum sickness, vomiting, and abdominal pain.


Frequency not reported: Anaphylaxis, serum sickness[Ref]


Frequency not reported: Vomiting, abdominal pain


Very common (10% or more): Hives/rash/welts (12%)

Common (1% to 10%): Itching, angioedema


Common (1% to 10%): Hypotension


Common (1% to 10%): Shortness of breath

More about antivenin (micrurus fulvius)

Patient resources

Related treatment guides


1. "Product Information. Antivenin (Micrurus Fulvius) (antivenin (Micrurus fulvius))." Wyeth-Ayerst Laboratories, Philadelphia, PA.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.