Severe Viper Envenomation: A Case Report From Portugal

Snakebite envenomation is uncommon in Portugal but may lead to significant morbidity when systemic toxicity develops. We report a case of a 57-year-old woman who presented with hypotension, progressive limb edema, and venom-induced coagulopathy following a viper bite. The progression of edema, together with systemic toxicity, prompted early antivenom administration and transfer to an intermediate care unit, with a second dose required in response to persistent edema. Supportive management included fluid resuscitation, limb elevation, and empirical antibiotic therapy for persistent fever. The patient showed progressive clinical and laboratory improvement, ultimately achieving full recovery. This case underscores the importance of early recognition of systemic toxicity and timely antivenom therapy to prevent severe complications associated with viper envenomation.