In Slovak Republic and the region of Central and Eastern Europe the viper is the only species of venomous snake living in wild. During the last nine observed years (1993-2002) the Toxicological Information Center (TIC) was consulted in 81 cases of individuals attacked by snakes. 51 of these cases were by viper, rattlesnake 6, and green mamba once. 23 cases were by non-venomous snakes; adder 22 times and royal snake once. The viper and adder attacks occurred in the wild and the other cases with snake keepers. None of affected individuals died. Our contribution contains the new recommended therapy procedures for viper attack.