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Antivenin (crotalidae) polyvalent Side Effects

For the Consumer

Applies to antivenin (crotalidae) polyvalent: intravenous powder for solution

Along with its needed effects, antivenin (crotalidae) polyvalent 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 or nurse immediately if any of the following side effects occur while taking antivenin (crotalidae) polyvalent:

More common
  • Bloating or swelling of the face, arms, hands, lower legs, or feet
  • difficulty with moving
  • flushing or redness of the skin
  • itching skin or rash
  • muscle pain or stiffness
  • nausea
  • pain in the joints
  • tingling of the hands or feet
  • unusual weight gain or loss
  • unusually warm skin
  • vomiting
Less common
  • Black, tarry stools
  • bleeding gums
  • blood in the urine or stools
  • chills
  • confusion
  • decreased urination
  • dizziness
  • dry mouth
  • fainting
  • fever
  • increase in heart rate
  • lightheadedness
  • pinpoint red spots on the skin
  • rapid breathing
  • sunken eyes
  • thirst
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • wrinkled skin

Some side effects of antivenin (crotalidae) polyvalent may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common
  • Headache
  • pain in the arms or legs
Less common
  • Fear or nervousness
  • trouble sleeping

For Healthcare Professionals

Applies to antivenin (crotalidae) polyvalent: injectable solution, intravenous powder for injection

General

The most common adverse events were urticaria and rash.

Dermatologic

Very common (10% or more): Urticaria (16%), rash (11%)
Common (1% to 10%): Pruritus, cellulitis, subcutaneous nodule, ecchymosis
Postmarketing reports: Erythema, hyperhidrosis, angioedema

Hypersensitivity

Allergic reaction consisted of urticaria, dyspnea, and wheezing. Serum sickness included urticaria, cough, rash, pruritus, and urticaria. Acute allergic reactions manifested as anxiety, bronchospasm, chills, edema, fever, hypotension, pruritus, rash, urticaria, voice alteration, and/or wheezing.[Ref]

Common (1% to 10%): Allergic reaction, serum sickness
Postmarketing reports: Acute allergic reactions including anaphylaxis or anaphylactoid reactions, delayed allergic reaction.[Ref]

Hematologic

Common (1% to 10%): Coagulation disorder
Postmarketing reports: Delayed or recurrent coagulopathy or thrombocytopenia, thrombocytopenia refractory to treatment, bleeding

Cardiovascular

Common (1% to 10%): Hypotension
Postmarketing reports: Tachycardia

Nervous system

Common (1% to 10%): General paresthesia, nervousness
Postmarketing reports: Tremor, dizziness, headache[Ref]

Respiratory

Common (1% to 10%): Asthma, cough, increased sputum
Postmarketing reports: Tachypnea, bronchospasm, wheezing, tracheal edema, dyspnea

Musculoskeletal

Common (1% to 10%): Back pain, myalgia
Postmarketing reports: Musculoskeletal chest pain, chills

Gastrointestinal

Common (1% to 10%): Nausea, anorexia, circumoral paresthesia
Postmarketing reports: Tongue swelling, lip swelling

Other

Common (1% to 10%): Chest pain, wound infection, chills
Postmarketing reports: Failure to achieve initial control, recurrent swelling refractory to treatment, prolonged hospitalization, treatment failure resulting in death, chest discomfort, swelling

Psychiatric

Common (1% to 10%): Nervousness

Ocular

Postmarketing reports: Worsening eye sight

References

1. "Product Information. Crofab (antivenin (crotalidae) polyvalent)" Savage Laboratories, Melville, NY.

Some side effects of antivenin (crotalidae) polyvalent may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

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