Psychotomimetic refers to any drug that can mimic symptoms of psychosis, such as delusions and delirium, but does not lead to hallucinations. There are numerous drugs that have this type of effect. For example, many opioid drugs have psychotomimetic effects because they lead to delusions without hallucinations. There is also some evidence that certain cannabinoids can be psychotomimetic, including delta THC. Some hallucinogens will initially trigger hallucinations, but could leave the individual with residual psychotomimetic effects after the hallucinations fade into the background. It is also possible for psychotomimetic drugs to lead to other symptoms as well, such as apathy, avolition, and anhedonia.