The patient initially arrived at the Johns Hopkins Itch Center with complaints of extreme pruritus on her arms, legs, and stomach.
“We had the patient rate her symptoms using a numerical rating scale, where 10 is the worst itch and zero is no itch at all,” Kwatra says.
The researchers believe that one of the active ingredients in medical marijuana, tetrahydrocannabinol—commonly known by its abbreviation THC—attaches itself to brain receptors that influence the nervous system.