Question: If oleandor was ingested by touching the plant stems inner part and then directly eating without washing hands, how long would u exspect symptoms would start? And how severe would you say symptoms may get.

Reference:
Oleander poisoning: 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).   This article is for information only. DO NOT use it to treat or manage an actual poison exposure. If you or someone you are with has an exposure, call your local emergency number (such as 911), or your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. Poisonous ingredients include:     - Digitoxigenin   - Neriin   - Oleandrin   - Oleondroside      Note: This list may not include all poisonous ingredients. The poisonous substances are found in all parts of the oleander plant:     -  Flowers    -  Leaves    -  Stems    -  Twigs Oleander poisoning can affect many parts of the body.   HEART AND BLOOD     - Irregular or slow heartbeat   - Low blood pressure   - Weakness      EYES, EARS, NOSE, MOUTH, AND THROAT     - Blurred vision   - Vision disturbances, including halos     STOMACH AND INTESTINES     - Diarrhea   - Loss of appetite   - Nausea and vomiting   - Stomach pain      NERVOUS SYSTEM     - Confusion   - Death   - Depression   - Disorientation   - Dizziness   - Drowsiness   - Fainting   - Headache   - Lethargy     SKIN     - Hives   - Rash      Note: Depression, loss of appetite, and halos are most often seen in chronic overdose cases. Seek immediate medical help. DO NOT make a person throw up unless told to do so by poison control or a health care provider. Get the following information:     - Person's age, weight, and condition   - Name and part of the plant swallowed, if known   - Time it was swallowed   - Amount swallowed Your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. This hotline number will let you talk to experts in poisoning. They will give you further instructions.   This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does not need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week. The provider will measure and monitor the person's vital signs, including temperature, pulse, breathing rate, and blood pressure. Symptoms will be treated as appropriate. The person may receive:     - Activated charcoal   - Blood and urine tests   - Breathing support   - Chest x-ray   - EKG (electrocardiogram, or heart tracing)   - Fluids through a vein (IV)   - Medicines to treat symptoms including an antidote to reverse the effects of the poison   - Tube through the mouth into the stomach to wash out the stomach (gastric lavage) How well you do depends on the amount of poison swallowed and how quickly treatment is received. The faster you get medical help, the better the chance for recovery.   Symptoms last for 1 to 3 days and may require a hospital stay. Death is unlikely.   DO NOT touch or eat any plant with which you are not familiar. Wash your hands after working in the garden or walking in the woods. Updated by: Jesse Borke, MD, FACEP, FAAEM, Attending Physician at FDR Medical Services/Millard Fillmore Suburban Hospital, Buffalo, NY. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team. Editorial update 10/26/2016.

Answer: 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). Iff you had an exposure, call your local emergency number (such as 911.) Call the US national toll-free Poison Help hotline (1-800-222-1222) if you have any questions about poisoning or poison prevention. It does not need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.  Oleander poisoning can cause irregular or slow heartbeat, low blood pressure, weakness, blurred vision, vision disturbances, including halos, diarrhea, loss of appetite, nausea and vomiting, stomach pain, confusion, disorientation, dizziness, drowsiness, fainting, headache, lethargy, hives, and rash. Depression, loss of appetite, and halos are most often seen in chronic overdose cases. The faster you get medical help, the better the chance for recovery. Symptoms last for 1 to 3 days and may require a hospital stay. Death is unlikely.