>The analysis showed the presence of atropine, scopolamine and ephedrine in the three replicated hair samples (Fig. 5) at the following concentrations: 6.7, 9.2, and 10.7 (mean = 8.9) pg atropine/mg hair, 384, 423 and 504 (mean = 437) pg scopolamine/mg hair, and 295, 328 and 367 (mean = 330) pg ephedrine/mg hair.
Drug use in the broadest sense.
Atropine and scopolamine are no fun drugs as deliriants they require extraordinary skill. In this case the ratio of atropine:scopolamine could be indicative of Datura stramonium [0] growing in the region.
Most recreational drug users who try to experiment with Datura et al. quickly realize after "waking up" ~ 24 hours or so totally disoriented in questionable disposition with little to no memory with what had happened that it is nearly impossible to put them into "good use" and leave it be at some point. Regular use is mostly documented by highly experienced shamans (i.e. experienced in different forms of altered state of consciousness).
[As a note aside: In 1934 Bill Wilson a struggling alcoholic and later founder of AA had a transformative experience under the heavy influence of atropine and scopolamine ("Belladonna Cure") after which he became sober:
>At Towns Hospital under Silkworth's care, Wilson was administered a drug cure concocted by Charles B. Towns. Known as the Belladonna Cure, it contained belladonna (Atropa belladonna) and henbane (Hyoscyamus niger). These plants contain deliriants, such as atropine and scopolamine, that cause hallucinations.
It was while undergoing this treatment that Wilson experienced his "Hot Flash" spiritual conversion. While lying in bed depressed and despairing, Wilson cried out: "I'll do anything! Anything at all! If there be a God, let Him show Himself!" He then had the sensation of a bright light, a feeling of ecstasy, and a new serenity.] [1]
Ephedrine on the other hand is a stimulant (methamphetamine analogue with a hydroxyl group at the β position), now mostly used by bodybuilders in much higher doses (an order of magnitude higher than measured in the hairs above) to effectively burn fat.
[0]https://en.m.wikipedia.org/wiki/Datura_stramonium
[1]https://en.m.wikipedia.org/wiki/History_of_Alcoholics_Anonym...