1. Induce Vomiting
Like many other poisonous plants, winterberry shrubs need to be expelled from the body as quickly as possible. If the victim took them within a few hours, induce vomiting by sticking your finger down his throat or by administering ipecac syrup. Make sure the victim is conscious and able to sit up before you do this, so you don't run the risk of choking him.
2. Take Activated Charcoal
Winterberry shrubs have been used in traditional brews and medicines. Their berries contain theobromine, a type of caffeine that may lead people to accidentally ingest far more than they should. Activated charcoal can help neutralize the toxins by bonding to the chemicals. Once the charcoal has bonded, the body won't digest it and it can pass harmlessly out via the digestive system..
3. Make Sure the Victim Is Breathing
Cardiovascular failure is very rare with winterberry shrub poisoning, but excessive caffeine intake can lead to problems in that area. Keep the victim's mouth and nose clear and make sure he is breathing. You may wish to monitor the heart and pulse rate as well, to ensure that it stays steady. In extreme cases where hospital care is required, they will monitor the victim's vital functions and may insert a breathing tube in order to keep the air passages clear.
4. Stay Hydrated
Winterberry shrub poisoning often leads to vomiting and diarrhea, which dehydrates the body. In addition, theobromine is a diuretic, which causes you to urinate more frequently. You can counteract dehydration by drinking plenty of water. If you're having trouble swallowing, you can suck on ice or take tiny sips frequently. Continue drinking water even after the symptoms have passed, as it will help your body replenish.
5. Take Medication From the Doctor
If the winterberry shrub poisoning is bad enough to require serious medical attention, your doctor may prescribe specific medications to help you handle the symptoms, Antidiarrhetic medication and antiemedic medication will help control the nausea and loose stool. In severe cases, a doctor may also perform gastric lavage, which involves pumping water into the stomach and suctioning out poisonous materials. You should always consult with a physician before taking any medication, and always call a doctor or a poison center when dealing with a case of winterberry shrub poisoning.


