Delusional parasitosis, or delusory parasitosis, also known as Ekbom's syndrome, is a form of psychosis. Victims acquire a strong delusional belief that they are infested with parasites, whereas in reality no such parasites are present. Often, exposure to household cleaning products can result in a sensation known as formication.
To treat chronic pain, cannabinoids have been taken by mouth in the form of capsules or sprayed into the mouth as THC, benzopyranoperidine (BPP), cannabidiol (CBD), nabilone, dronabinol, or synthetic nitrogen THC analogs (NIB), with doses of 2.5-20 milligrams for an average of 25 days.
1 the CBD/THC ratios used (one study found prevention of psychotic symptoms with a higher CBD/THC ratio [i.e. more CBD], and an increase in symptoms with a lower CBD/THC ratio [i.e. less CBD]) and.  method and timing of administration.