So what can you do? If you suspect you have been poisoned, and cannot get to medical care, immediately chug a glass of warm water and make yourself vomit with the old finger-down-the-throat trick. Then drink another glass and do it again. If you are certain that you ingested a poison, crush some wood charcoal or burned animal bones into a fine powder, mix a tablespoon of this powder with a glass of water and drink it. Then let your body filter the poison as best as it can. If poisoning is even suspected, don't drink any alcohol, as this can amplify some plant and fungal toxins. Unfortunately, there is no decent way to treat poisoning in the field, short of having a prescription antidote.