There are five primary color-tests reagents used for general screening purposes. The Marquis reagent turns into a variety of colors when in the presence of different substances. Dille-Koppanyi reagent uses two chemical solutions which turns a violet-blue color in the presence of barbiturates. Duquenois-Levine reagent is a series of chemical solutions that turn to the color of purple when the vegetation of marijuana is added. Van Urk reagent turns blue-purple when in the presence of LSD. Scott Test's chemical solution shows up as a faint blue for cocaine base. 
Anti-NMDAR encephalitis typically affects younger patients. In one series of 100 cases , the median age was 23 years (range, 5-76 years); over 90% were female. In that series, patients presented with psychiatric symptoms or memory disorders (100%), decreased levels of consciousness (88%), dyskinesias (86%), and seizures (76%), All had antibodies in the cerebrospinal fluid against subunits of the NMDA receptor. Since these receptors are prevalent in the limbic system and the hippocampus , patients develop signs and symptoms of limbic encephalitis : memory loss, hallucinations, irritability, agitation, sleep disturbance and seizures.
It’s not milkweed. Milkweed grows taller and has tiny white flowers, and it is a plant the Monarch Butterflies seek to lay their eggs and incubate them on. This is more like the dandelion (Australian) as it too has flat broad leaves and yellow flowers on tall stalks that come from the centre of each plant. Don’t use the wrong thing, as you could get incredibly sick if you are thinking of trying this remedy. It is a common garden weed, but do your research to keep safe, please. I think many herbal remedies can be very beneficial. Cheers all.