The most common venomous snake in Europe is the Vipera berus or common European adder, while no extremely venomous snakes are free-living in nature. At present, exotic venomous snakes are in Europe only found in captivity (zoo or as a pet). Toxicity by venomous snakes can be characterized by three major features are as follows: cytotoxic (swelling and tissue damage in the bite area), neurotoxic (paralysis or other nervous system injuries) or hemotoxic (blood clot disturbances).[...]
D’Hoore, L., & Anseeuw, K. (2020). Preparing for venomous snake bites in Europe. European Journal of Emergency Medicine, 27(4), 247-248. https://doi.org/10.1097/MEJ.0000000000000694 (Original work published 2020)