Rasahus biguttatus has a mild level of toxicity transmitted through bites, specifically utilizing its fangs. Adults of this species carry the toxin, which can cause discomfort or mild reactions in various animals. For instance, humans might experience localized pain and swelling. Pets such as dogs and cats can also be affected if they come into contact with rasahus biguttatus, exhibiting similar mild symptoms. Smaller mammals, like mice, can show stronger reactions due to their size, and insects may be paralyzed or killed, which often aids rasahus biguttatus in predation.