There are a very large number of toxins that can lead to hallucinations and/or delirium.
A psychotomimetic reaction, with apparent visual or auditory hallucinations, delirium and heightened or only slightly decreased level of consciousness, is most commonly due to:
In addition, a large number of drugs that impair consciousness may lead to delirium usually without significant hallucinosis. These drugs are discussed under drugs leading to coma.
Features that help to differentiate between these drugs are:
See also delirium treatment.