i have used diphenhydramine once , it has some deliriant properties.but i haven't heard anything about antipsychotic properties of diphenhydramine,wikipedia says:
"People with mental health problems—especially those with schizophrenia—are also prone to abuse the drug, which is self-administered in large doses to treat extrapyramidal symptoms caused by the use of antipsychotics."
linkit can help to relieve unintentional movements of mental disorders but i don't think it can do anything to treat mental problems effectively.it can even worsen problems by making deliriums.