They may be in a confused and delirious state that requires hospitalization. Death can result if treatment is not prompt.
[narconon.org]
Taking a higher dose could lead to confused and disoriented behavior, antisocial behavior, delusions, hallucinations, irritability, fear, paranoia, and even aggressiveness
[hiredpower.com]
There may be hallucinations and confusion. The person may think there are bugs crawling on his skin. They may pick and scratch at their skin.
[narconon.org]