Poison from the Oleander plant causes irregular heart beats. Oleander, however, is toxic to humans and pets, every part of it, and the outcome of ingesting even a small amount of it can be dire. Phytodermatitis is an allergic … Oleander can be found in the gardens of suburban neighborhoods all over the world. It contains the toxins neriin, digitoxigenin, oleandrin, and olendroside. Many poisonous plants contain substances that can react with sunlight to make them even more irritating to the skin (phytophotodermatitis). Oleander is a dense, fast-growing evergreen shrub that has been growing since ancient times and is native to North Africa and the eastern Mediterranean regions. This species of tree belongs to the same family as Oleander, and is also quite toxic to humans. It is an evergreen shrub that is native to Southeast Asia. So toxic is the blossom that consuming honey from bees that consumed nectar from the Oleander plant can cause death. The Nerium oleander plant may be toxic to animals and humans. Be careful what you touch, and what you eat. This article is for information only. Though they are mainly found in the leaves and stems of the plant, all of the parts of an oleander plant are considered to be toxic. Ingesting any part of this plant can be deadly, especially for children. Both the oleander leaves and the oleander stem contain poisonous sap. Yes, they can. Oleander poisoning occurs when someone eats the flowers or chews the leaves or stems of the oleander plant (Nerium oleander), or its relative, the yellow oleander (Cascabela thevetia). These toxic compounds have also been used from antiquity for various medical treatments. Do not ingest any parts of the oleander plant itself. An extract of oleander contains naturally occurring phytochemicals (plant produced compounds) that have been removed from the structural material of the leaves of the plant. Even smoke from burning oleander can … DO NOT use it to treat or manage an actual poison exposure. Oleander (leaves and branches) is deemed extremely dangerous, with the poison known to affect the heart, produce severe digestive upset, and to have caused death. Skin allergy to oleanders can be revealed through patch testing, where patches containing small amounts of the offending allergen are taped to the patient's skin. Nerium oleander is a highly toxic plant from the Apocynaceae family. Oleander is one of the most toxic, commonly grown garden plants in the world. Signs of oleander poisoning include gastrointestinal issues (nausea/vomiting, stomach pain, bloody diarrhea), heart problems (slowed pulse, irregular heartbeat, dizziness) along with other symptoms like dilated pupils and drowsiness.See a detailed list of oleander poisoning symptoms here Are oleander flowers poisonous to touch and can Oleander flowers cause skin irritation?