Details of delusional parasitosis vary among sufferers, but it is most commonly described as involving perceived parasites crawling upon or burrowing into the skin, sometimes accompanied by an actual physical sensation (known as formication). Sufferers may injure themselves in attempts to be rid of the parasites.
Perhaps one of the earliest trials in 1982, gave participants a dose of THC (1 mg/kg), followed by either a dose of valium or of CBD (0.5 mg/kg). The results suggested that CBD had a counteractive effect on THC stimulated anxiety.
A mouth spray might contain 2.7 milligrams of THC and 2.5 milligrams of CBD at doses of 2.5-120 milligram for up to eight weeks. Patients typically use eight sprays within any three hours, with a maximum of 48 sprays in any 24-hour period. To treat schizophrenia: 40-1,280 mg CBD by mouth daily for up to four weeks.