Xanthalian Venom

Callisto used Xanthalian Venom to poison the guests at Hercules' birthday party. It made Jason, Alcmene, Iolaus, Iphicles and Falafel go temporarily mad. They had hallucinations and ended up trying to kill one another. The only cure is a bite from one of the Golden Apples from the Tree of Life. Hercules managed to get an apple back to Corinth to save his friends and family.