What are the symptoms of a pit viper bite?

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Last updated: June 15, 2025View editorial policy

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From the Research

Symptoms of a pit viper bite include immediate pain, swelling, and redness at the bite site, which can spread to the entire affected limb within hours, as well as systemic symptoms such as nausea, vomiting, and bleeding abnormalities due to the venom's effect on blood clotting, as reported in a recent study 1. The severity of symptoms depends on factors including the snake species, amount of venom injected, bite location, and victim's size and health status. Some key symptoms to look out for include:

  • Immediate pain, swelling, and redness at the bite site
  • Bruising, blistering, and tissue damage around the wound
  • Systemic symptoms such as nausea, vomiting, dizziness, weakness, rapid heart rate, low blood pressure, and difficulty breathing
  • Bleeding abnormalities, such as bleeding gums or blood in urine, due to the venom's effect on blood clotting
  • Neurological symptoms like numbness, tingling, or a metallic taste in the mouth If bitten, it is essential to seek immediate medical attention, keep the affected area immobilized and positioned below heart level, remove constricting items like jewelry, and avoid traditional remedies like cutting the wound or applying tourniquets. Pit viper venom contains enzymes that destroy tissue and affect blood clotting, which is why prompt medical treatment with antivenom is crucial for preventing serious complications, as highlighted in a study on the treatment of pit viper envenomation 2. Additionally, the use of viscoelastic monitoring, such as thromboelastography (TEG), may be beneficial in guiding hemostatic resuscitation in victims of venom-induced consumptive coagulopathy (VICC) 2. It is also important to note that the effectiveness of antivenom administration and the risks of blood product transfusion should be carefully considered, as reported in a study on the use and abuse of blood products in the treatment of pit viper envenomation 3.

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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