Why Oleander plant considered to be one of the most poisonous plant?

                               The Oleander plant is a small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. However, this plant is considered to be one of the most poisonous plants in the world. Simply touching an oleander plant can cause skin irritation, particularly if you come into contact with the plant sap. If you are cultivating oleander, wear gloves when you prune the shrub, and wash your hands well afterward.

When you grow an oleander plant in the garden you need to avoid growing oleanders in home landscapes where children and pets play. All parts of oleander shrubs are poisonous and the smoke from burning oleander debris is toxic. It can cause nausea, vomiting, diarrhea, weakness, headache, stomach pain, serious heart problems, and many other side effects. Taking oleander leaf, oleander leaf tea, or oleander seeds has led to deadly poisonings. Oleander is also extremely toxic to cats, dogs and horses.